A machine has an efficiency of 25%. Energy is fed into the machine at the rate of 1kw. What is the output power of machine ?
Q: A child is standing on top of a 15ft hill, getting ready to run down all the way to the bottom. If…
A: Introduction: The energy of a body is stored in the form of potential energy due to the height…
Q: A rocket uses 4 kJ of chemical potential energy stored in the fuel while shooting the 0.55 kg rocket…
A:
Q: PHYS-91; Multiple Choice: A 10,000-watt motor operates an elevator weighing 5000 newtons. Assuming…
A:
Q: 09: A person trying to lose weight by burning fat lifts a mass of 10 kg up to a height of 1 m 1000…
A: Given : Lifting mass = 10 kg Height = 1m Number of times = 1000 Energy supplied by fat per kg…
Q: A coal power plant has a rated output of 150 MW and a first law efficiency of 41%. Coal has an…
A: We are aware that a coal power plant has a first law efficiency of 41% and a rated output of 150 MW.…
Q: A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the…
A: Given data Weight of the person W = 600 N time taken t = 10 s Power is defined as the work done per…
Q: In a building, building materials are raised using an electric motor with a power consumption of…
A:
Q: A kid on a bike coasts (No Pedaling) from the bottom to the top of a 25 m hill. What is the energy…
A: Given: The kid goes from bottom to top. The height of the hill is 25 m.
Q: (a) What is the efficiency of an out-of-condition professor who does 1.90 x 105 J of useful work…
A: (a) The expression to solve for the efficiency of the work done by the professor while metabolizing…
Q: Your friend wants to solve the world’s energy problems by inventing a device that will deliver ten…
A: The world or the universe works on some conservation laws. The energy conservation says that energy…
Q: How much work must be done to stop a 1300-kg car traveling at 112 km/h? (Hint: You will need to…
A:
Q: (a) What is the efficiency of an out-of-condition professor who does 2.10 x 105 J of useful work…
A: A) work = 2.1 × 105 J Food Energy = 500×1000 cal = 21× 105 J B)…
Q: In the figure, the vehicle has a mass of 2000 kg, and is traveling at a speed of v = 50 m/s. If the…
A:
Q: As a gasoline engine is running, an amount of gasoline containing 15,000J of chemical potential…
A:
Q: A 5 kg book is pushed across a table with a velocity of 1 m/s. Once the person pushing lets go the…
A:
Q: A person in good physical condition can put out 100 W of useful power for several hours at a…
A: We know that one people produces an output of 100 W so the number of people that can produce 5 kW of…
Q: A 1400-kgrace car can go from 0 to 100 km/h in 4.8 s . What average power is required to do this?…
A:
Q: A) Find its velocity as a function of time. Letters A and B are not allowed in the answer. Express…
A: Given, Acceleration,axt=At-Bt2 Where A=1.50m/s2B=0.120m/s2 A. Acceleration,…
Q: How much work is done by a table as it holds up a 3.8 kg cat? O OJ O 3.8J O 37J O The answer depends…
A: Given Mass m of cat = 3.8 kg gravitation acceleration g = 9.8 m/s2
Q: Catching a wave, a 74.6-kg surfer starts with a speed of 1.18 m/s, drops through a height of 1.80 m,…
A: The initial energy of the surfer is
Q: A car (m=1000 kg) is initially moving at a speed of 20 m/s (~45 mph) when the driver hits the brakes…
A: Work done is equal to change in kinetic energy W=∆EK=12mvf2-vi2=121000 kg0-20 ms2=-200000 J=-200 kJ
Q: If a 1 kg stone is thrown vertically upward w/ a kinetic energy of 680 J. it will rise to height of…
A: According to conservation of energy , the kinetic energy of stone is equal to the potential energy…
Q: A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min.…
A: We have, Volume of water=30 m3 t=15 min=15×60 t=900 s h=40 m n=30%
Q: A bicycle and rider going 14 m/s approach a hill. Their total mass is 93 kg. (a) What is their…
A: Given data: Initial velocity (v) = 14 m/s Mass (m) = 93 kg
Q: How much work is done by a table as it holds up a 3.8 kg cat? Your answer: O OJ 3.8 J 37 J The…
A: The work done to hold up a cat on the table is the potential energy due to the gravitational force.…
Q: A car of mass 1500 kg is initially travelling at a speed of 10 m/s. The driver then accelerates to a…
A: At intial Velocity of the car = 10m/s Mass of the car =1500 kg At final Velocity of the car =25…
Q: (a) What is the average power consumption in watts of an appliance that uses 5.93 kW · h of energy…
A: The energy consumed by any electrical appliance in a given time period is given by following…
Q: An box with mass of 2kg is pulled from the bottom of a 30 deg ramp to the top, a distance of 3…
A: Here the mass of a box = m = 2kg the angle of ramp above the horizontal = θ= 30othe distance…
Q: How much work must be done to stop a 900-kg car traveling at 108 km/h? (Hint: You will need to…
A: Given data: Mass (m) = 900 kg Initial velocity (u) = 108 km/h Final velocity (v) = 0 m/s Required:…
Q: Science laboratories and research facilities must use high efficiency computers that calculate and…
A: The total input energy of the supercomputer is Ei=49,690 J. The useful output energy of the…
Q: A crane slowly lifts a 263 - kg crate a vertical distance of H = 13.0 m. mg F crane crane H (a) How…
A:
Q.20:- A machine has an efficiency of 25%. Energy is fed into the machine at the rate of 1kw. What is the output power of machine ?
Step by step
Solved in 2 steps with 2 images