Calculate the temperature increase of 100 kg of brake material with an average specific heat of 800 J/kg-°C if the material retains 10% of the energy from a 10,000-kg truck descending 75.0 m (in vertical displacement) at a constant speed.

Q: (1a) What is the kinetic energy in joules of a 1030-kg automobile traveling at 97 km/h? =__________…

A: Kinetic Energy= (1/2)mV2

Q: (a) Rowing your shell to work one day, you give off 4.8 * 105J of heat and do 6.2 * 105J of work.…

A: Using the first law of thermodynamics, we can write, ∆U=q+w where ∆U is the change in internal…

Q: )How long in minutes will the energy in a 904 k) (216 kcal) cup of yogurt last in a woman doing work…

A: Given: The energy is 904 kJ.             The power is 125 W.             The efficiency is 20.0%.…

Q: Suppose a woman does 450 J of work and 9300 J of heat transfer occurs into the environment in the…

A: Workdone by the women is W = 450 J Amount of heat transfer is Q = -9300 J (As heat is going out of…

Q: Suppose a woman does 500 ) of work and 9500 J of heat transfer occurs into the environment in the…

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Q: In a given location, would a helicopter require more energy in summer or winter to achieve a…

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Q: The energy released from condensation in thunderstorms can be very large. Calculate the energy…

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Q: (1.) A 3.0kg metal block slides on a rough, horizontal surface inside an insulated pipe. After…

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Q: From what height should be dumped a body with mass of 3 kg, so that the amount of heat given off,…

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Q: 2. (15 %) (a) A tropical cyclone can be modelled as a Carnot heat engine which takes in energy from…

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Q: A soft drink manufacturer clains that a new diet drink is "low Joule." The label indicates the…

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Q: An object with a large surface area has a mass of 20kg, and falls freely under gravity from a height…

A: Given: The mass of the object is 20 kg. The initial height of the object from the ground is 25 m.…

Q: The efficiency of a muscle during weight lifting is equal to the work done in lifting the weight…

A: efficiency of a muscle during weight lifting is equal to the work done in lifting the weight divided…

Q: A 1.0 x 102-kg steel support rod in a building has a length of 2.0 m at a temperature of 20.0°C. The…

A: Part A:

Q: A heat engine is involved with exchange of heat of 1915 J, –40J, + 125J and –QJ, during one cycle…

A: Given data- Q1=1915 J Q2=-40 J Q3=125 J Q4=-Q J η=50%=0.5

Q: How much work can a heat engine emit for each kilogram of burned coal with an combustion heat of 16…

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Q: (a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in…

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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: For a certain system executing a cyclic process 350 J of heat are absorbed by the system and 120 J…

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Q: A power plant taps steam superheated by geothermal energy to 558 K (the temperature of the hot…

A: Given data: Temperature of hot reservoir, Th=558 K Temperature of cold reservoir, Tc=305 K Output…

Q: A 65kg box is being pulled across a floor that has friction with a rope that has a tension of 50 N…

A: When multiple forces applies on a object, then splitting them is best way to solve problem. In this…

Q: (10° N/m®) 2.6 A 2.0 1.0 D 0.6 1.0 4.0 V (10°m²) B.

A: Solution:

Q: A 60 kg woman cheats on her diet and eats a 493 Calorie (493 kcal) jelly donut for breakfast. (a)…

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Q: A 16-lb weight is attached to the lower end of a coil spring suspended from the ceiling stretches…

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Q: A simple pendulum is suspended from the ceiling by means of a string and this time, the pendulum is…

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Q: In a game of football outdoors on a cold day, a player will begin to feel exhausted after using…

A: Given : ∆U = -8 × 105 J (negative because internal energy is lost before being exhausted) In part…

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Q: An ideal heat engine operates between 177 degree C and 27 degree C. If the engine takes 5*1000000 J…

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Q: It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg…

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Q: Give the change in internal energy of a system if(a) W = 50 J, Q = 50 J; (b) W = -50 J, Q = -50 J;…

A: Step 1: Part (a) Given: The work done is W=50 J. The heat is Q=50 J. The expression for change in…

Q: A 100-gram apple is dropped off a 200 m high cliff. As it falls its temperature drops by 2.5 °C due…

A:

Q: -What is the change in internal energy of a system which does 3.5 x 10^5 J of work while 3.00×10^6 J…

A: Given data The work done by the system is W = 3.5 x 105 J. The heat transferred to the system is…

Q: An asteroid made out of iron (7860 kg/m3) strikes the Earth in an area where the oceans are very…

A: Given data: The density of asteroid is ρ=7860 kg/m3. The speed of asteroid is v=30 km/s. The…

Q: The engine of a large ship does 2.00 × 108 J of work with an efficiency of 5.00%. (a) How much heat…

A: a) The expression for find heat transfer into the system is η=WQinQin=Wη Substitute values in the…