Which of the following is an energy conservation practice? O Lower the thermostat's temperature in the summer. Run the washing machine with smaller loads. O Use a fuel-efficient vehicle when traveling. O Raise the temperature on a water heater.

Q: The total mass of a paratrooper - the person and all the gear - is 118kg. the paratrooper jumps out…

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Q: A fire is lit in a hot air balloon, causing 100 J of heat to flow into the air in the balloon.…

A: The change in internal energy is given by, ∆U=Q-W

Q: A refrigerator does 26.0 kJ of work while moving 107 k] of thermal energy from inside the…

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Q: A certain rain cloud at an altitude of 2.10 km contains 3.20 107 kg of water vapor. How long would…

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Q: On reentry, the Space Shuttle’s protectiveheat tiles became extremely hot. (a) Was the mechanical…

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Q: Riding a bike burns 100 calories per mile. If you ride at 20 miles per hour, what is your average…

A: Solution:-Given thatEnergy=100 calories per milespeed=20 miles per hour

Q: When you skid to a stop on your bike, you can significantly heat the small patch of tire that rubs…

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Q: The coefficient of performance for a freezer is 7.8. a. How much heat must be extracted by the…

A: Given   Cop = n = 7.8  H1 = 2.3kJ  H3 = 330 J

Q: The winning time for the 2005 annual race up 86 floors of the Empire State Building was 10 min and…

A: Dear student, this question contains more than three sub-parts. As per guide lines we will answer…

Q: A 10 kg migratory swan cruises at 20 m/s. A calculation that takes into account the necessary forces…

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Q: 4. a. A weightlifter curls a 100 kg bar, raising it each time a distance of 0.61 m. How many times…

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Q: No machine operates with 100% efficiency. How does this relate to the Law of Conservation of Energy?…

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Q: A 1600 kg car steadily accelerates from rest to 60 mi/hr over a 2.8 second time span. How much work…

A: Given:mass of car, m = 1600 kgfinal velocity, vf = 60 mi/hr = 26.816 m/s

Q: 1. At the end of a 15-min session on a stationary bike at the gym, the bike's display indicates that…

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Q: According to the law of conservation of energy: O Energy is conserved only when the device is 100%…

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Q: An assistant for a football team carries a 26.0 kg cooler of water from the top row of the stadium,…

A: We kno that work done  W=Fdcosθ a) F=26*9.81=255.06  angle θ=180 Wok done by the assistant…

Q: A(n) 65-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.0 s. (a) Calculate the…

A: Given: The mass of the sprinter is m=65 kg. The speed of sprinter is v=11 m/s. The time is t=4 s.…

Q: Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are…

A: mass m = 15000 kg slope θ = 6o co efficient of friction is   μ = 0.32 initial speed  u = 35 m/s Let…

Q: Problem 12:  When water flows through river rapids or over a waterfall, it experiences a decrease in…

A: Height of waterfall (h) = 41 m  Specific heat of water (c) = 4.19 × 103 J / kg ° C

Q: A steam engine absorbs 7.91×105J and expels4.99 × 105J in each cycle. Assume that all ofthe…

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Q: Energy O Pie Chart V Speed + 8 00:00.00 Speed V Stick to Track Friction 8.8 m/s None Lots Gravity…

A: The total mechanical energy ( Kinetic energy + Potential energy ) of a system remains constant if…

Q: A bungee jumper has a mass of 74.3 kg and falls a distance of 113 m before the bungee catches and…

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Q: A 75-g bullet is fired from a rifle having a barrel 0.0660 m long. Choose the origin to be at the…

A: Given:- m=75 kg  x=0.6 m  F(x)=16000+10000x-24000x2, x in the meter.  Find:- A) Determine the work…

Q: You set your stationary bike on a high 80-NN friction-like resistive force and cycle for 30 minmin…

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Q: 600 J of work are done on a system in a process that decreases the system's thermal energy by 400 J.…

A: Given that : 600 J of work are done on a system in a process that decreases the thermal energy by…

Q: Two objects interact with each other and with no other objects. Initially object A has a speed of 4…

A: Given:          Initial velocity of object A (uA) = 4 m/s         Final velocity of object A (vA) =…

Q: A truck mass of m=1210kg drives up an incline at a constant speed of v = 12.7 m/s. The forces of air…

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Q: Suppose a woman does 650 J of work and 9300 J of heat is transferred from her into the environment…

A: The objective of the question is to find the change in the woman's internal energy and her percent…

Q: A certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant…

A: Given that :- Power capacity , P=850 MW  Output , W=0.26Q11

Q: Which of the following statements are true? If you apply a force to a moving object, you are doing…

A: To check which of the following statements are true.

Q: A 55 kg box is raised a distance of 2.0 m above a storeroom floor. What is the change of potential…

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Q: When you put on the brakes on your bicycle, friction heats the steel rims of your wheels. Could this…

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Q: A heat engine takes in 2500J and does 1500J of work.   a) How much energy is expelled as waste?…

A: Given Data: The heat supplied to the engine is: Qs=2500 J The work produced by the engine is: W=1500…

Q: Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.…

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Q: Mountain climbers carry bottled oxygen when at very high altitudes, since the atmosphere contains…

A: Write the expression for the amount of oxygen needed per minute and substitute the corresponding…

Q: A 7.80-g bullet moving at 690 m/s penetrates a tree trunk to a depth of 5.10 cm. (a) Use work and…

A: Given : Mass of a bullet (m) = 7.80 g = 0.0078 kg Initial speed (vi) = 690 m/s Final speed (vf) = 0…

Q: The internal energy of a 5-kg suitcase starts at 150 kJ. The suitcase is mangled as it travels…

A: Given data, Internal energy of the suitcase = 150 kJ Work done on the suitcase = 10 kJ Heat loss…

Q: If you have a ball with a mass of 6.00kg, that has an initial velocity of vA=(2.00i + 5.00j)m/s and…

A: Given value--- mass = 6 kg. initial velocity =( 2i + 5j ) m/s. final velocity = (-2i + 8j) m/s. We…

Q: With friction: For the car, what is the speed at the top of the loop (point D) if 4% of the total…

A: Given Data: Initial height is H=60 m Initial velocity is u=1.5 m/s Mass of car is m=500 kg

Q: The surface waters of tropical oceans are at a temperature of 27°C while water at a depth of 1200 m…

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Q: avocado has 180 Calories. If all this energy could be used to lift a bucket of water weighing 40 N,…

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