what efficiency is the machine using in obtaining this result? % If your actual efficiency is 0.19, how many kcal did you really burn? kcal

Q: heat engine exhausts 8,200 J heat while performing 3,200 J of work. What is the efficiency of this…

A: Efficiency of heat engine is ratio of work done to the heat input .

Q: A newly proposed device for generating electricity from the sun is a heat engine in which the hot…

A: Given: The temperature of the cold reservoir is T1=200 The maximum efficiency is η=60% According…

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 70 steps per…

A:

Q: gasoline engine is running, an amount of gasoline containing 11,700 J of chemical potential energy…

A: Efficiency =W/Q

Q: This problem compares the energy output and heat transfer to the environment by two different types…

A:

Q: give a specific example of a process that has the energy changes and transfers described. (For…

A: in  given process , internal energy is constant or change in internal energy is zero, but work or…

Q: As a gasoline engine is running, an amount of gasoline containing 16,000 J of chemical potential…

A: The work done by the engine, W=4000 J   The input chemical energy, Einput=16000 J

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 85 steps per…

A: Calculate the change in height.

Q: This problem compares the energy output and heat transfer for the environment by two different types…

A:

Q: The efficiency of a Carnot heat engine is 25%. It takes 4000 J of heat input. What is the heat…

A:

Q: A certain heat engine does 9.4 kJ of work and 8.5 kJ of heat is transfered to the environment in a…

A: Work done by the engine is given as follows: W=Q1-Q2 Here Q1 and Q2 are the heat transfer to the…

Q: 6. An engine does 10J of work and exhausts 15J of waste heat. (a) what is the efficiency? (b) If the…

A:

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: A heat engine receives 500 J of heat from its combustion process and loses 327 J through the exhaust…

A: Heat received by heat engine (Q)  = 500J  Heat lost due to exhaust and friction = 327 J

Q: As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential…

A: Given Data: The input energy is: Qi=11100 J The output energy is: Qo=3700 J

Q: Find the time interval for each cycle of a particular heat engine that has a mechanical power output…

A:

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 495 kW-h/y.…

A: Given : Coefficient of Performance, COP = 6.3  Power, P = 495 Kw-h/y  Specific heat of water,…

Q: A(n) 63-kg sprinter accelerates from rest to a speed of 11.0 m/s in 5.6 s. (a) Calculate the…

A:

Q: what is the maximum possible coefficient of performance of a heat pump that brings energy from…

A: Given: Temperature, Th = 22o C = 273+22 = 295 K and Tc = 3o C = 273+3 = 276 K

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 525 kW-h/y.…

A: given coefficient of performance of 6.30 It is advertised as using 525 kWh/yr

Q: You perform maintenance on an engine, increasing its efficiency by 5 %.  How much more work is…

A: Given data : Efficiency, Input heat,

Q: As a gasoline engine is running, an amount of gasoline containing 15,200 J of chemical potential…

A:

Q: Suppose you spend 30.0 minutes on a stairclimbing machine, climbing at a rate of 90.0 steps per…

A: The efficiency of the machine is

Q: A heat engine does 20 J of work while exhausting 30 J of waste heat. What is the engine’s…

A:

Q: A power plant operates at a 32.0% efficiency during the summer when the seawater used for cooling is…

A: Actual efficiency of the power plant in summer is

Q: please answer the following   As a gasoline engine is running, an amount of gasoline containing…

A: Given data *The given input chemical potential energy is Ein = 12,000 J *The work done by the engine…

Q: As a gasoline engine is running, an amount of gasoline containing 18,500 J of chemical potential…

A: (a) The engine's efficiency is η=work doneEnergy input×100%=3700 J18500 J×100%=20%

Q: In one cycle, a freezer uses 785 J of electrical energy in order to remove 1950 J of heat from its…

A:

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 433 kW-h/y.…

A: The refrigerator is a device (heat engine) that extracts energy from the sink and deposits on the…

Q: The performance factor of a refrigerator is equivalent to (1/3) the performance factor of a Carno…

A:

Q: A heat engine uses two containers held at different temperatures. One container is at 312 K, while…

A:

Q: What is the ideal efficiency of an engine that runs at 3500 K when the surrounding air is 250 K?

A: The formula for the efficiency is given in terms of temperatures η=1-TcTh

Q: You are hired to build a geothermal power plant that absorbs heat from a hot water spring and…

A: The temperature of the surrounding air in kelvin is, Tc=17+273 K=290 K The efficiency of the Carnot…

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 75 steps per…

A: Given Weight W=150lb=150×4.44=666N Height of each step h=8×0.0254=0.2032 m Time t=30 min Step rate…

Q: heat engine uses boiling water at 100°C which is then lowered to 25°C upon leaving the engine. What…

A:

Q: Suppose you spend 30.0 minutes on a stair- climbing machine, climbing at a rate of 90.0 steps per…

A: Part A:

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 65 steps per…

A: Time spend on the machine t=30 minutes  The rate of climbing  = 65 steps / minutes  Height of each…

Q: A woman expends 95 kJ of energy in walking a kilometer. The energy is supplied by the metabolic…

A: the efficiencies of the two processes.  kJ (driving)/ kJ (walking)  = 41.748.

Q: The heat supplied is 500 J. The heat loss to the environment is 160 J. Step 2 Calculation: Write…

A: Solution Given that Heat supplied (Q1) = 500J, Heat lost (Q2) = =160J efficiency (n) = ?

Q: A heat engine produces 2000 J of work while operating between 210 degrees Celsius and 35 degrees…

A:

Q: Problem 3: Suppose a subject on a treadmill puts out work at the rate of 95 W while consuming oxygen…

A:

Q: n engine takes in 600 J and exhausts 450 J each second is running. What is the engine's efficiency?

A: η=1-QlowQhigh