week 5 #9 A model steam engine of 1.00 kg mass pulls eight cars of 1.00 kg mass each. The cars start at rest and reach a velocity of6.40 m/s in a time of 3.00 s while moving a distance of 4.50 m. During that time, the net heat input is 125 J. What is the change in the internal energy of the engine? _____J

Physics written by hand please.

An electrical power station requires 1.05 × 1014 J of heat transfer into the engine and has an efficiency of 42 %. a.) How much heat transfer occurs to the environment by the electical power station in J?  b.) What is the ratio of heat transfer to the environment to work output?  c.) How much work is done in J?

A certain gas is compressed adiabatically. The amount of work done on the gas is 800 J. What is the change in the internal energy of the gas? Question 4 options:   400 J   More information is needed to answer this question.   0 J   -800 J   800 J     For vapor water at 2°C Question 5 options:   Cp < Cv.   Cp > Cv.   Cp = Cv.   More information is needed to answer this question.

8.4 A cylinder is equipped with a tight - fitting but easily movable piston. The cylinder contains 2.0x10^-4 m^3 of gas with normal air pressure. With a bunsen burner, the cylinder is heated until ga - then doubled its volume. a) Calculate how much work the gas does during the expansion b) How much does the internal energy change during the expansion of the gas have 5 degrees of freedom? c) How much heat has been added to the gas during the expansion?\

Sections 14.2 and 14.3 provide useful information for this problem. When a monatomic ideal gas expands at a constant pressure of 6.7 x 105 Pa, the volume of the gas increases by 8.0 x 103 m³. Determine the heat that flows. If heat flows into the gas, then the heat flow is positive. If the heat flows out of the gas, then the heat flow is negative. Number i Units

Consider the following processes. 1. Energy flows as heat from a hot object to a colder object. 2. Work is done on a system and an equivalent amount of energy is rejected as heat by the system. 3. Energy is absorbed as heat by a system and an equal amount of work is done by the system. Which are never found to occur? O Only II and III O Only I Only III O I, II, III O Only II

86. D A lawnmower engine with an efficiency of 0.22 rejects 9900 J of heat every second. What is the magnitude of the work that the engine does in one second?

Prior to cooking you mix in a pan 100 g of cooking oil A which is initially at 60C with 200 g of cooking oil B which is initially at 30C. You then add 300 g of oil C initially at 20C and mix this in as well. Assume that the mixing happens so quickly that there is no heat transfer between the pan and the oils and that the heat capacity of each oil is identical.   What is the temperature of the mixture of oils A and B in the pan before oil C is added?

On a trip, you notice that a 5.30-kg bag of ice lasts an average of one day in your cooler. What is the average power in watts entering the ice if it starts at 0°C and completely melts to 0°C water in exactly 24 hours (1 Watt-1 Joule/second and Latent heat of fusion of water is 334 kJ/kg and latent heat of vaporisation of water is 2256 kJ/kg) O A. 20.49 W O B. 1770 W ○ C. 20.49 kW O D. None of the options provided is correct. O E. 78.44 W