As a gasoline engine is running, an amount of gasoline containing 16,000 J of chemical potential energy is burned in 1 s. During that second, the engine does 4,000 J of work. (a) What is the engine's efficiency (in percent)?  %   The burning gasoline has a temperature of about 4,700°F (2,900 K). The waste heat from the engine flows into air at about 86°F (303 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures? (b)         %

A gas is compressed inside a cylinder. An average force of 12 N acts to move the piston 3 m. During the compression, 12 J of heat are conducted away from the gas. What is the change in internal energy of the gas?     Calculate answer to one decimal.

As a gasoline engine is running, an amount of gasoline containing 18,500 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,700 J of work. (a) What is the engine's efficiency (in percent)?  % (b) The burning gasoline has a temperature of about 4,100°F (2,500 K). The waste heat from the engine flows into air at about 90°F (305 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?  %

In performing 154.0 J of work, an engine exhausts 65.0 J of heat. What is the efficiency of the engine? e = 29

An engine releases 0.150 kJ of heat for every 0.310 kJ of work it does. What is the efficiency of the engine?

A large electrical power station generates 1050 MW of electricity with an efficiency of 37.0%. (a) Calculate the heat transfer (in J) to the power station, Q, in one day. (b) How much heat transfer Q. (in J) occurs to the environment in one day? (c) If the heat transfer in the cooling towers is from 35.0°C water into the local air mass, which increases in temperature from 18.0°C to 20.0°C, what is the total increase in entropy (in J/K) due to this heat transfer? J/K (d) How much energy (in J) becomes unavailable to do work because of this increase in entropy, assuming an 18.0°C lowest temperature? (Part of Q. could be utilized to operate heat engines or for simple space heating, but it rarely is.) to Additional Materials O Reading CS Scanned with CamScanner

The average electricity consumption of a house in Gainesville is known to be 1,036 kWh in a month (One month = 30 days). They would like to install solar panels of 30 % efficiency to generate this electricity. Given that the average solar power density in Gainesville is 5.47 kWh/m2/day, how much surface area must the panels occupy? Calculate the result in m² but do not write the unit. Round off you E swer to a whole number (zero decimal place.)

Let W = (2.70 ✕ 105 J) ln(Vf /Vi). Solve for the unknown quantity in each of the following cases:   (a) the final volume Vf is three times the initial volume Vi  W= ______Joules (b) the initial volume is 1.00 m3 and the work W is 3.25 ✕ 105 J Vf =  ______ m3

In order to keep a basement from flooding, it is necessary to pump 285 kg of water each minute from the basement up to a height of 3.28 m (and then outside). If 18.6% of the total energy used by the pump is wasted as heat, what is the minimum wattage pump that is required to keep the basement from flooding?

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 engine has a 22.0% efficiency, which means that 22.0% if the energy released by the burning gasoline is converted into mechanical energy. What is the average mecanical power output of the engine? What volume of gasoline is consumed? Assume that the burning of 1.00 L of gasoline released 46.0 MJ of energy.