A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal conditions. If T is the surface tension of soap solution, the energy spent in the blowing:

How much work is done when a piston is compressed from 7.71 L to 4.98 L under constant atmospheric pressure (1.013 x 105 Pa)? Give your answer in joules.

The formula v = √(P/ρ) can be used for any gas considering isothermal process. True or False? a) True b) False

(a) A large electrical power facility produces 1600 MW of “waste heat,” which is dissipated to the environment in cooling towers by warming air flowing through the towers by 5.00ºC . What is the necessary flow rate of air in         m3 /s ? (b) Is your result consistent with the large cooling towers used by many large electrical power plants?

Convert 7.13 ✕ 103 cal to the equivalent number of kilocalories (also known as Calories, used to describe the energy content of food), and joules. (a) kilocalories  ?kcal (b) joules  ?J

In a refrigeration system, the refrigerant gas absorbs 21.39 kJ of energy while expanding against a0.278 atmosphere pressure from a volume of 0.0423 liters to a volume of 1.876 liters. What is the change in the internal energy of the gas? Note that 1 literxatmosphere is equal to .101.325 joule

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV to the power of 1.4 = C where C is a constant. Suppose that at a certain instant the volume is 480 cubic centimeters and the pressure is 75 kPa and is decreasing at a rate of 10 kPa/minute. At what rate in cubic centimeters per minute is the volume increasing at this instant? Please Write legible

A certain heat engine does 9.5 kJ of work and 8.00 kJ heat transfer occurs to the environment in a cyclical process. (a) What was the heat transfer (in kJ) into this engine? kJ (b) What was the engine's efficiency (in percent)? %

A yoyo of radius R and mass M is released from rest with the string vertical and its top end fixed up a support as shown below. How fast is the center of mass of the yoyo moving when it has fallen a distance of 47 cm. Ignore the mass of the string and express your answer if m/s

An engine has a hot-reservoir temperature of 980 K and a cold-reservoir temperature of 550 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?