here are almost no machines with an efficiency of 100%. Friction causes energy to be ‘lost’ as heat. This energy is not truly ‘lost.’ It has been converted to:

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: "A heat engine accepts 200 J of heat from a hot reservoir, does work, and releases 160 J to a cold…

A: Given  Heat taken Q1 = 200 J  Heat given to sink Q2 = 169 J

Q: A heat engine receives 500 j of heat from its combustion process and loses 391 J through the exhaust…

A: Given data:  Heat input (Qin) = 500 J Heat loss = 391 J Required: The efficiency of heat engine

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

A:

Q: A steam engine operates at an overall efficiency of 15%. How much heat be supplied per hour in order…

A: Heat supplied per hour P=WtP=ηQtQt=Pη

Q: Second Law of thermodynamics. An engine in performing 196 J of work discharges 34 J of heat. What is…

A:

Q: You perform maintenance on an engine, increasing its efficiency by 6.84 %.  How much more work is…

A:

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

A: Efficiency =W/Q

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: An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the…

A: Heat takes the engine,                               Heat exhausts the engine,…

Q: A heat engine exhausts 3 200 J of waste heat while performing 1 500 J of useful net work. What is…

A: Given data: Work done W=1500J Heat exhausted QC=3200J

Q: A steam engine delivers 5.4×108 J of work per minute and services 3.6×109J of heat per minute from…

A: Given :W= 5.4 x 108JH= 3.6 x 109J

Q: The heat that goes into a particular Carnot engine is 4.00 times greater than the work it performs.…

A: We have to find the efficiency of the carnot engine. We know the heat input in the carnot is 4 times…

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: 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: You perform maintenance on an engine, increasing its efficiency by 9.86 %.  How much more work is…

A: Given:- The efficiency of the engine is increasing by 9.86 %. The heat input is 1367 J  Find:- How…

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

A:

Q: A PHYS 1510 student was working on a robotics project. The joints on the machine they were building…

A:

Q: An ideal Heat Engine is determined to have an efficiency of 21.7% and a power output of 139kW. How…

A: Write the given values with the suitable variables. η=21.7%=0.217Po=139 kW Here, η and Po are the…

Q: If energy is always conserved, never created or destroyed, then why do most of the machines in our…

A: SOlution: To explain If energy is always conserved, never created or destroyed, then why do most of…

Q: a coal fired power station is a huge hit engine. it uses hit transfer from burning coal to do work…

A:

Q: You and your team are exploring an antiquated research facility in the mountains of southern…

A: Given:  1. YAl=6.9×1010 N/m22. YTi=1.2×1011 N/m23. ρAl=2700 kg/m34. ρTi=4500 kg/m35. Open frequency…

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…

A:

Q: A heat engine extracts 45.0 kJ from the hot reservoir and exhausts 40.0 kJ into the cold reservoir.…

A: The work done by heat engine: W=QH-QC Efficiency η=1-QCQH Given QC=40kJ QH=45kJ

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

A:

Q: A heat engine extracts 59 kJkJ from the hot reservoir and exhausts 32 kJkJ into the cold reservoir.…

A:

Q: As a gasoline engine is running, an amount of gasoline containing 13,600 J of chemical potential…

A: Given: Input energy, E=13600 J Work done, W=3400 J

Q: Frozen waste from airplane toilets has sometimes been accidentally ejected at high altitude.…

A: Given,

Q: Suppose that a heat engine takes 3.20  104 J of heat from the high-temperature reservoir to produce…

A:

Q: An engine absorbs 500 J of heat and reject 100 J of heat to cold reservoir in each cycle.  What is…

A: Given data: The amount of heat absorb is QH=500 J. The amount of heat reject is QL=100 J.

Q: A car with mass of 1138 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ingnore air resistance. The…

A: Solution:   Given Values, Mass (m)=1138 Kginitial velocity(u)=0 m/sfinal velocity(v)=40…

Q: Can you help 2a and subpart 2b  1. A certain power plant produces useful work (i.e. electricity) at…

A: The energy produced can be calculate by using the formula Eo=Pt , where P=900×106 J/s is the power…

Q: A refrigerator does 26.0 k) of work while moving 117 kJ of thermal energy from inside the…

A:

Q: What is the efficiency of an engine that does 300 J of work in each cycle while discarding 600 J to…

A: Given data: The work done by the engine, W=300 J. The heat energy released by the engine to the…