Answer:
Explanation:
Heat gained by ice in warming up to 0⁰C = .035 x 2090 x (83-0)= 6071.45 J
heat used up by ice to melt at 0⁰C = .035 x 3.33 x 10⁵ J = 11655 J
Heat used up in warming up water to t⁰C = .035 x 4186 x t = 146.51 t
heat released by warm water to cool from 22⁰C to t = .565 x 4186 x ( 22 - t )
=52032 -2365.1 t
heat released by copper calorimeter to cool from 22⁰C to t = .087 x 387 x ( 22 - t ) = 740.72 - 33.7 t
total heat released = 52032 -2365.1 t + 740.72 - 33.7 t
= 52772.72 - 2398.8 t
Heat lost = heat gained
52772.72 J- 2398.8 t = 6071.45 J + 11655 J + 146.51 t
2545.31 t = 35046.27
t = 13.8°C.
What is the name for this timeboxed iteration?
Scrum teams typically use brief iterations to get fast feedback from a variety of customers at a particular time.
This time-boxed iteration is referred to in Scrum as a Sprint, and it typically lasts one week. A timeboxed iteration is a time-restricted period during which the team concentrates on a single objective and creates a new piece of software. This is a sprint in the Scrum methodology where the team works toward the sprint goal specified in the sprint planning. A timebox is a set amount of time during which a person or a team works to achieve a common objective. Timeboxing is a tool used in agile project management to keep work moving quickly and on schedule. It is also an important part of Scrum.
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Why was sonar technology so important during the Cold War?
It was created with the aid of ground-breaking research into the ways in which sound travels across water and was intended to keep an eye on the Soviet Union's expanding submarine menace.
What makes sonar so crucial?
To "see" in the water, sonar uses sound waves.
Sonar is largely used by NOAA scientists to create nautical charts, find underwater navigational hazards, find and map things on the bottom like shipwrecks, and map the actual seafloor.
Leonardo da Vinci utilised a tube introduced into the water to listen for vessels in order to employ the technology for the first time, in 1490. To combat the rising threat of submarine warfare, it was developed during World War I, and by 1918, a functioning passive sonar system was in use.
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What is the list order of accuracy for the second derivative Mcq?
The least possible order of accuracy for the second derivatives is 2.
What are derivatives?
A derivative is a security with a price that is dependent on or derived from one or more underlying assets. A derivative itself is a contract between two or more parties based on an asset or assets. Its value is determined by the fluctuations of the underlying asset. The common underlying assets include shares, bonds, commodities, currencies,. Interest rates and market indices.Derivatives can be traded (over-the-counter, OTC) or on an exchange. OTC derivatives make up a larger proportion of existing derivatives and are unregulated, while exchange-traded derivatives are standardizedTo know more about derivatives, click the link given below:
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A 65kg bicyclist is coasting to the right while experiencing a 50N drag. Neglect any friction impeding the motion. What is the magnitude of the net force on the bicyclist? What is the magnitude of her acceleration?
The net force acting on the bicyclist along with its own weight is 687 N. The magnitude of acceleration for this force is 10.56 m/s².
What is force?Force is a physical quantity characterised by its magnitude and direction. Force deform an object or changes its state of rest or motion. Force of a moving body is the product its mass and acceleration.
The normal force acting on an object by ts weight = mg
thus normal force on 65 kg bicyclist = 65 Kg × 9.8 m/s² = 637 N.
The dragging force acting on him = 50 N.
The resultant force = 637 N + 50 N = 687 N
Force = m a
acceleration = force/ mass
= 687 N/ 65 Kg
= 10.56 m/s².
Therefore, the net force on the bicyclist is 687 N with an acceleration of 10.56 m/s².
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Explain how an object with a higher temperature can have less thermal energy than an object with a lower temperature.
An object with the higher temperature can have less thermal energy than an object with the lower temperature because of the mass difference.
The thermal energy of an object is given by the relation,
Q = mC∆T
Where,
Q is the thermal energy,
m mass of the bodies,
C is the specific heat capacity and,
∆T is the change and temperature.
As we can see, from the above relation that thermal energy is depending on the specific heat and mass of the body. We can understand this thing by the example of an Iceberg and a cup of hot tea. The Iceberg is at a much lower temperature but it has a higher amount of thermal energy because it has a bigger amount of mass.
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How do you solve a line cut by a transversal?
To solve a line cut by a transversal, use the properties of parallel lines, such as corresponding angles and alternate interior angles, to find the unknown angle measurements.
When a line is cut by a transversal, a number of simultaneous equations can be formed by using the properties of parallel lines. For example, the corresponding angles of the lines will always be equal, the alternate interior angles will be equal, and the consecutive interior angles will add up to 180 degrees. Using these properties, you can identify the unknown angle measurements. For example, if the measure of one of the corresponding angles is known, the measure of the other corresponding angle can be determined simply by using the fact that they are equal. Similarly, if one of the alternate interior angles is known, the other can be determined using the fact that they are equal. By forming these equations, you can solve for the unknown angle measurements.
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what does the number 2.001 represent in the following: t(58) = 2.001, p < .05?
The degree of freedom in the equation is denoted by the number 58: t(58)=2.001, p.05.
The degree of freedom refers to how many logically independent value i.e., values with the freedom to change there are in the sample of data. One is deducted from the total number of elements in the data sample when calculating degrees of freedom.
Degrees of freedom can be calculated using a simple statistical technique. Degrees of freedom are equal to the number of values in a data collection less one, as stated by the formula: df = N-1.
N is the total number of values included in this data collection (sample size).
The degrees of freedom, or the quantity of unrestricted data points available for comparison in a t-test The number 58 in the t-test above indicates the degrees of freedom, or the number of unrestricted data points available in a t-test to compare two groups.
(In statistics, a T-test is used to compare the means of two groups. The values required for a t test are the t-value, p-value, and degrees of freedom.)
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F= 10k F2 12k F3 = 18k Problems analytical solutions using force components. check graphically 2.9 three members of a truss frame into a steel gusset plate as shown. all forces are concurrent at point o. determine the resultant of the three forces that must be carried by the gusset plate.
The resultant of the three forces that must be carried by the gusset plate is 22.14k
The resultant itself means total or amount. So, it can be said that the resultant force is the total or overall force acting on a system. The resultant force is a vector quantity.
F₁
sin 30° = x₁/10k
x₁ = 10 × sin 30° × k
x₁ = 5k
Similarly:
y₁ = 10k × cos30°
y₁ = 10k × 0.866
y₁ = 8.66k
F₂
The angle at F₂ is 0 degrees θ = 0°
So:
x₂ = -12k
y₂ = 0
F₃
cos 45° = x₃/18k
x₃ = 18 × cos 45° × k
x₃ = 12.728 k
Similarly:
y₃ = 18k × sin 45°
y₃ = 18k × 0.707
y₃ = 12.728 k
Resultant of x:
x = x₁ - x₂ + x₃
x = 5k -12 k + 12.728 k
x = 5.726 k
Resultant of y:
y = y₁ - y₂ + y₃
y = 8.66k - 0k + 12.728 k
y = 21.388k
Resultant F:
F = [tex]\sqrt{x^2 + y^2}[/tex]
F = [tex]\sqrt{ 5.726^2 + 21.388^2 }[/tex]
F = [tex]\sqrt{ 32.787+ 457.446 }[/tex]
F = [tex]\sqrt{ 490.233 }[/tex]
F = 22.14k
So, the resultant of the three forces is 22.14k
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Give an example of each of the following energy conversions/transformations:
a. Electrical to heat
b. Chemical to heat
c. Electrical to mechanical
Please respond in 1–2 complete sentences for each item using your best grammar.
The example of each of the energy electrical to heat, chemical to heat, electrical to mechanical energy is as given below.
a.) Every electric heater has a resistor as its heating element. Electric heating is the conversion of electrical energy to thermal energy. It converts electrical energy into heat energy when an electric current crosses a resistor, according to the Joule heating principle.
b.) Exothermic reactions, which commonly release chemical energy in the form of heat, are those that take place. Newly formed bonds can store some of the heat energy required for a reaction to proceed as chemical energy.
c.) An electric motor converts electrical energy into mechanical energy. A generator converts mechanical energy into electrical energy. A storage dam's mechanical energy is transformed into electrical energy via a hydroelectric powerplant.
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how would you rearrange the ideal gas equation to calculate the pressure of a gas multiply p by v divide nrt by v multiply nrt by v divide v by nrt multiply pv by rt
An ideal gas equation to calculate the pressure of a gas is PV=nRT where P is pressure, V is volume, n is number of mole,R is gas constant and T is temperature.
In thermodynamics, Ideal gas equation is a clear cut guess of the way of behaving of many gases under different circumstances. Ideal Gas Condition is the blend of experimental regulations like Charle's regulation, Boyle's regulation, Gay-Lussac's regulation, and Avogadro's regulation. Ideal Gas equation is the equation characterizing the conditions of the speculative gases communicated numerically by the blends of observational and actual constants. It is likewise called the general gas condition. It very well may be characterized as:
Ideal Gas equation is the equation characterizing the equations of the speculative gases communicated numerically by the blends of exact and actual constants. It is additionally called the general gas equation. It tends to be characterized as PV=nRT.
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Write Informative Text What type of change mut occur for pure ubtance to combine into new material? Name a few kind of ynthetic material that can be produced by thi type of change
Synthetic fibers, ceramics, polymers, artificial foods and pharmaceuticals, and composites are all examples of synthetic materials. Synthetic fibers are elastic.
They can be used to produce garments as well as other items. Synthetic fibers include rayon, polyester, and nylon. Synthetic fibers (man-made fibers) are created by combining chemical monomers to form polymers through a chemical reaction known as polymerisation. Sodium hydroxide and carbon disulphide are commonly used compounds (derivatives of coal, oil, or natural gas). Synthetic materials, on the other hand, are man-made and cannot be found in nature. Synthetic items are typically generated in laboratories by combining various chemicals or by preparing molecules and substances in a laboratory.
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(a) what is the loss of kinetic energy (ki - kf) in the situation described in the example?
The loss of kinetic energy of the moving car is 238,866 J
Kinetic energy is the energy in a moving object due to its motion,
K.E. = 1/2 M[tex]V^{2}[/tex]
Given in the question,
Mass of big car M1 = 1640 kg
Mass of small car M2 = 820 kg
Initial velocity of big car V1 = 0
Initial velocity of small car V2 = 25.6 km/s
using the principle of conservation of momentum,
Total momentum before collision = total momentum after collision
M1V1 + M2V2 = V (M1+M2)
1640 × 0 + 820×25.6 = V ( 1640+ 820)
V = 820 ×25.6 /2460
= 8.53 Km/s
So, loss of kinetic energy of the small car = 1/2 M2[tex]V^{2}[/tex]
= 1/2 × 820× ([tex](25.6)^{2}[/tex] - [tex](8.53)^{2}[/tex])
= 238,866 J
The given question is incomplete, the complete question is
An 1640 kg car stopped at a traffic light is struck from the rear by a 820 kg car. The two cars become entangled, moving along the same path as that of the originally moving car. If the smaller car were moving at 25.6 m/s before the collision, what is the velocity of the entangled cars after the collision?
What is the loss of kinetic energy (Ki - Kf) in the situation described in the example?
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assuming that the styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat capacity of the metal, cmcmc m ? express your answer numerically in joules per kilogram kelvin.
The specific heat capacity of the metal, cm is 214.87 J/kg-k.
As per the given data,
we need to find the specific heat capacity of the metal, cm.
According to the above question,
it is given that,
Weight of chunk of an unknown metal is 1.00kg
chunk has been in boiling water for several minutes and it is quickly dropped into an insulating Styrofoam beaker containing 1.00kg of water at 18.0°C.
After stirring for 5.00 minutes, the water's temperature has reached a constant value of 22.0°C .
The water specific heat capacity is cw = 4190J/(kg)
Now,
temperature of metal is 100 degree celsius ( water boils at 100 degree celsius )
equilibrium temperature = 22 degree celsius
specific heat capacity of water Cw= 4190 J/kg-K
According to question, specific heat capacity of metal be Cm
Therefore,
mass of metal that is Mm = 1 kg
mass of water that is Mw = 1 kg
we know that,
heat energy lost by metal is equal to heat energy gained by water
(assuming no heat is lost to the surroundings)
heat energy lost by metal = Mm * Cm * (100 - 22)
heat energy lost by water = Mw * Cw * (22 - 18 ) (given - initial temperature of water = 18 degree celsius)
therefore,
Mw * Cw * (22 - 18 ) = Mm * Cm * (100 - 22)
4190 * 4 = Cm * 78
Cm = 214.87 J/kg-k
Hence, the specific heat capacity of the metal, cm is 214.87 J/kg-k.
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Complete Question:
A 1.00kg chunk of an unknown metal that has been in boiling water for several minutes is quickly dropped into an insulating Styrofoam beaker containing 1.00kg of water at 18.0°C. After gently stirring for 5.00 minutes, you observe that the water's temperature has reached a constant value of 22.0°C . The specific heat capacity of water is cw = 4190J/(kg-K) . Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat capacity of the metal cm. Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat capacity of the metal, cm?
A bullet of mass 0.01kg is fired with velocity of [230,0]m/s in to a sack of sand of mass 9.99kg which is swinging from rope. At the moment the bullet hits, the sack has a velocity of [0,0.2]m/s. Workout the velocity of bullet of the sack.
Answer:
The velocity of the bullet and the sack after the bullet hits the sack is [0.2,0.2] m/s.
Explanation:
To calculate the velocity of the bullet and the sack after the bullet hits the sack, we can use the equation:
vf = (m1 * v1 + m2 * v2) / (m1 + m2)
Plugging in the values given in the question, we get:
vf = (0.01 kg * [230,0] m/s + 9.99 kg * [0,0.2] m/s) / (0.01 kg + 9.99 kg)
Solving for vf, we get:
vf = [0.2, 0.2] m/s
Therefore, the velocity of the bullet and the sack after the bullet hits the sack is [0.2,0.2] m/s.
The initial and final momentum of a body will be conserved during collision. From this concept, the final velocity of the bullet and sack is 2.5 m/s.
What is momentum?Momentum is the product of mass and velocity of a body. During a collision of two bodies, the sum of initial momentum of the two bodies will be equal to the sum of their final momentum.
Given that, mass of bullet = 0.01 Kg
velocity = 2300 m/s
mass of sand sack = 9.99 Kg
velocity = 0.2 m/s
Then sum of initial momentum = (0.01 kg × 2300 m/s) + (9.99 kg × 0.2 m/s) = 24.9 kg m/s.
The final momentum of the combined mass = (9.99 kg + 0.01 kg) v = 24.9 Kg m/s
Thus, final velocity v = 24.9 / ( (9.99 kg + 0.01 kg) = 2.5 m/s
Therefore, the velocity of the bullet and sack after the collision will be 2.5 m/s.
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a toad leaps straight upward. during takeoff, a 42 n normal force from the ground causes the toad to accelerate upward at 3.5 m/s/s. what is the mass of the toad?
The mass of the toad is 12kg if a 42N normal force from the ground causes the toad to accelerate upward at 3.5m/sec²
We know that according to newton second law of motion, which states that acceleration increase of a molecule is corresponding to the power applied to it and is toward this power. The proportionality steady is the mass m for a consistent mass molecule or an unbending body going through translatory movement whose inactivity can be decreased to a point.
We know that from newton second law of motion F=ma which is derived from the formula F=dp/dt where dp is the rate of change of momentum.Here. m is the mass of the body and a is the acceleration of the body.
We have F=42N,a=3.5m/sec²,m=?
Therefore,42N=m×3.5m/sec²
=>m=42N/3.5m/sec²
=>m=12kg
Hence, mass of the toad is 12kg.
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In a series circuit there are 17 light bulbs, each providing 1 ohm of resistance. What is the total resistance?.
In a series circuit there are 17 light bulbs, each providing 1 ohm of resistance , the total resistance is 17 ohms.
In a series circuit, the total resistance is equal to the sum of the resistances of all the components in the circuit. In this case, there are 17 light bulbs, each providing 1 ohm of resistance, so the total resistance of the circuit is 17 ohms.
This can be calculated using the equation:
Total Resistance = R1 + R2 + R3 + ... + Rn
where R1, R2, R3, etc. are the resistances of the individual components in the circuit.
In this case, the total resistance would be:
Total Resistance = 1 ohm + 1 ohm + 1 ohm + ... + 1 ohm
This simplifies to:
Total Resistance = 17 ohms
So the total resistance of the circuit is 17 ohms.
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The diagram is an illustration of global atmospheric circulation. Which of the following is the source of energy driving the circulation pattern labeled C in the diagram?
answer choices
The Coriolis effect
Solar radiation
Earth's magnetic field
The spinning core of Earth
Solar radiation is labelled as C in the diagram of global atmospheric circulation.
Winds are created by global atmospheric circulation, which results to areas of significant rainfall, such as tropical rainforests, and areas of dry air, such as deserts.
The global atmospheric circulation model is a simplified representation of the movement of air currents in the atmosphere. It is employed to aid in the explanation of weather patterns and climatic zones. Cells serve as the foundation of the global atmospheric circulation model. These cells are areas where air travels from low to high pressure.
Even though weather fronts and storms cause interruptions, there is a continuous pattern to how air travels about our planet's atmosphere. Because the Sun heats the Earth more at the equator than at the poles, this pattern is known as atmospheric circulation. It is also influenced by earth rotatory.
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a 200 g steel ball a hangs on a 1.0 m long string. the ball a is pulled sideways so that the string is at a 45-degree angle, then released. at the very bottom of its swing, the ball strikes a 500 g steel paperweight b that is resting on a frictionless table. to what angle does the ball rebound?
After solving the equation the ball rebound is θ2 = 18.88° is the correct answer.
What is Potential energy?
Potential energy is the energy held by an object due to its position or composition. It is the energy of an object that is stored and waiting to be released. This energy is due to the force of gravity, electric charge, and/or the force of a spring. Potential energy is also known as “stored energy”. It is measured in units of joules (J). Potential energy can be converted into kinetic energy, which is the energy of motion. Examples of potential energy include the energy stored in a stretched rubber band, the energy stored in a roller coaster car at the top of the hill, and the energy stored in a boulder at the top of a mountain. Potential energy can also be found in chemical bonds and nuclear energy.
Here Potential energy will convert to Kinetic energy,
P.E. (initial) + K.E. (initial) = P.E. (Final) + K.E. (Final)
M g L (1 – Cos 45) + 0 = 0 + ½ mv2
v2 = 2gL (1 – 1/0.414)
v = (2* 9.8* 1)0.5 * (1 – 1/0.414)0.5
v = 2.396 m/s
Thus, when ball strikes its velocity is 2.396 m/s.
From conservation of momentum
M1v1 + m2v2 = m1V1 + m2V2
0.2*2.396 = 0.2 V1 + 0.5 V2
Here, since no information is given for collision.
I am considering it to be elastic,
U1 – U2 = V2 – V1
U1 = V2 -V1
V2 – V1 = 2.396
0.2V1 + 0.5V2 = 0.4792
V1 = -1.027 m/s ; V2 = 1.369 m/s
i.e.,
½ m1v12 = m g L (1-Cos θ2) ---- Energy Conversion
V12 = 9.8 * 2 * 1 (1- Cos θ2)
1.055 = 19.6 (1 - Cos θ2)
Cos θ2 = 0.9462
θ2 = 18.88 °
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someone pls help me solve this problem thank you!
1. The equation of trajectory is: y = 5x²/4 +2x; it is equation of parabola.
2. The position vector = 2ti + (5t² +4t) j
3. The position of point M at t = 3 s is: ( 6,57).
4. The magnitude of velocity of point M at any time t is 2√(25t²+20t+5).
5. The magnitude of acceleration is 10m/s².
What is velocity?The term velocity has been defined as the rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is known as a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
Coordinates at any instant t are:
x = 2t; y = 5t² +4t
1. equation of trajectory is:
y = 5x²/4 +2x; it is equation of parabola.
2. position vector = 2ti + (5t² +4t) j
3. the position of point M at t = 3 s is: x = 2×3 = 6; y = 5×3² +4×3 = 57; i.e., ( 6,57)
4. the velocity vector of point M at any time t is = 2i + ( 10t +4) j
magnitude of velocity = √( 2² + (10t +4)² = 2√(25t²+20t+5).
5. the acceleration vector is = 10j m/s²
Therefore, its magnitude is =10m/s².
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What does an ammeter measure?
An ammeter is a device used to measure electric current in amperes, either in direct current (DC) or alternating current (AC).
Ammeters measure current in what ways?
A shunt resistor is used in digital ammeter systems to create a calibrated voltage proportionate to the current flowing. The analog-to-digital converter (ADC) in a digital voltmeter is then used to measure this voltage; the digital display is calibrated to show the current flowing through the shunt.
What three purposes does an ammeter serve?
1. It is utilise to gauge circuit current.
2. It is utilised in circuits to determine whether or not they are functioning properly.
3. It is also used in the electronic industry to examine the circuit and usage of the appliances.
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Two identical steel columns are used to support a level beam. Heat Heat B Image not displaying? As Column A gets heated, what happens to the ball? It moves left along the beam It falls straight down from its current position It moves right along the beam Nothing A streetlight is in a windstorm that exceeds the design rating. E Wind direction Light pole C D Base (в Ground Image not displaying? Which is the most likely location for a crack to start? A B D E An air tank is exposed to ambient temperature. If you set the air pressure of the tank to 35 psi for a leak test and find that 24 hours later the tank's pressure has increased, what could've happened? The tank leaked The tank drew in additional air The ambient temperature increased The ambient temperature decreased
A vertical structural component called a steel column is employed in building to offer crucial support. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression.
Additionally, bending moments along cross-section axes may be present in steel columns. Explanation: Beam-column structural members are those that experience simultaneous heavy axial compressive loads and bending. Only the existence of eccentric load application, end moments, and transverse loads distinguishes a beam-column from a column. 3. Describe girt. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression. Additionally, bending moments near cross-section may exist in steel columns.
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A 60kg man standing on a stationary 4okg boat throws a 0.2kg ball with a velocity of 50 m/s. Assuming there is no friction between the man and the boat, what is the speed of the boat after the man throws the ball?
Answer:
5/32 or 0.16 m/s
Explanation:
m1u1 + m2u2 = m1v1 + m2v2
(64x0) + (0.2 x 0) = (64 x v1) + (0.2 x 50)
v = (0.2 x 50) / 64
v = 5/32 or 0.16 m/s
(ignore negative sign as it means that the boat is moving the opposite direction of ball, that's why the answer was coming negative)
I hope my answer helps you.
How much power is required for an 80kg firefighter to run up 21.5m in 60s?
The amount of power required for the firefighter to run up the stairs in 60s is 28.66 watts
What is power?Power is described as the amount of energy transferred or converted per unit time.
parameters given ate
mass= 80kg
distance = 60seconds
We need to calculate the distance over which the force is applied. In this case, the firefighter is running up a 21.5m flight of stairs, so the distance is 21.5m.
Then, we calculate the amount of work required, we use the formula
Work done = Force* distance
Work done = 80kg * 21.5m = 1720 Newton
Therefore power = work done/ time
= 1720/ 60
Power = 28.66 watts
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Some microwaves operate using 1100 W of electrical power. If the current in the outlet is 20 A, what voltage is needed?
The voltage needed is 55 Volt.
What is electric power?
The rate at which energy is converted into an electrical circuit or used to produce work is known as electric power. It is a way to quantify how much energy is consumed over a certain period of time.
Given that: the microwaves operate using 1100 W of electrical power and the current in the outlet is 20 A,
Let, voltage needed is V.
We know that: electric power = voltage*current
Hence, Electric voltage = power / currect
= 1100 W/20 A
= 55 Volt.
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Which excerpt is an example of situational irony in sake's the storyteller?
“Most of the aunt’s remarks seemed to begin with ‘Don’t,’ and nearly all of the children’s remarks began with ‘Why?’ The bachelor said nothing out loud. ‘Don’t, Cyril, don’t,’ exclaimed the aunt, as the small boy began smacking the cushions of the seat, producing a cloud of dust at each blow.”
This statement is the correct answer for it.
It is taken from The story-teller, written by Saki.
What is situational irony?Situational irony is the irony of something happening that is very different to what was expected.
Irony involves a situation in which actions have an effect that is opposite from what was intended, so that the outcome is contrary to what was expected.
Situational irony involves the result of a situation not matching with your expectations, such as a baker being allergic to flour.
Situational irony allows writers to show the characters' intentions versus the outcomes, appearance versus reality.
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All of the following are examples of heat conduction except
a pressing a shirt with a hot iron.
b warming your hands over a campfire.
C warming your hands by holding a cup of hot
chocolate.
d heating soup in a pan on a stovetop.
Answer:
b
Explanation:
warming your hands over a campfire is not a example of it conduction because in heat conduction the body which transverse heat into the other bodies should be connected physically in the case of farming our hands over campfire there is no solid connectors our hands are being heated due to the radiation from the camp fire
henrietta leavitt found a relationship using the cepheid variables (in a star cluster) to help us determine distances. what was the correlation she found between the luminosity of a variable star and the period?
Heritage of Leavitt Using Cepheid variables, the distance to Andromeda of 2.5 million light-years was determined in the 1920s, demonstrating the galaxy's significant distance from the Milky Way.
What does the Cepheid variable do to let us calculate their luminosity?Distance Measuring with Cepheid Variables After determining a distant Cepheid's period, its brightness can be calculated using the known characteristics of Cepheid variables.
How can one determine the distances of star clusters or galaxies using the Cepheid period-luminosity relation?A Cepheid's fluctuation period correlates closely with its luminosity, as Henrietta Swan Levitt observed. The Cepheid becomes increasingly bright as the variability period lengthens. Astronomers have measured the distances to distant galaxies by observing Cepheid variables.
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true or false? a point that moves along the x-axis with constant, positive acceleration must always be moving from left to right
The statement is false. Acceleration is the rate at which velocity changes over time, both in terms of speed and direction.
A point or object travelling in a straight path is accelerated if it accelerates or decelerates. Even if the speed is constant, motion on a circle is accelerated because the direction is always changing. The rate of change of displacement is defined as velocity. The rate of change of velocity is defined as acceleration. Because it includes both magnitude and direction, velocity is a vector quantity. Because it is simply the rate of change of velocity, acceleration is likewise a vector quantity. Acceleration is the change in speed or direction of an object. The rate at which velocity varies is defined as acceleration. Keep in mind that velocity has two components: speed and direction.
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At what value of x does f have a discontinuity due to a vertical asymptote? give a reason for your answer.
If f has a discontinuity due to a vertical asymptote at x=a, then the function has a vertical asymptote at x=a.
A vertical asymptote occurs when the function approaches infinity as x approaches a certain value from either direction. This means that the function becomes arbitrarily large as x approaches the value of the vertical asymptote, but it never actually reaches the asymptote itself.
To determine the value of x at which f has a discontinuity due to a vertical asymptote, you need to find the value of x at which the function approaches infinity. This can often be done by examining the function and looking for expressions of the form 1/0 or 0/0, which indicate that the function is becoming infinitely large as x approaches a certain value.
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What is reinforcement in Psychology?
Reinforcement can be positive, meaning that a desirable consequence is provided, or negative, meaning that an undesirable consequence is removed
Reinforcement in psychology is an important tool for motivating behavior. It works by providing a consequence after a behavior occurs that makes it more likely to happen again in similar situations. Positive reinforcement is providing a desirable consequence, such as praise or a reward, after a behavior. Negative reinforcement is the removal of an undesirable consequence, such as a punishment, after a behavior. Reinforcement can be used to shape and strengthen desirable behaviors, as well as decrease undesirable behaviors. It is an effective way of motivating people and can be used in a variety of different contexts.
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