A heat engine has a cold reservoir of 250°C and a hot reservoir of 715°C. What is the efficienvy of the engine?

Moving a magnet inside a coil of wire will induce a voltage in the coil. How can the voltage in the coil be increased? A. Hold the magnet stationary. B. Move the coil of wire slowly, and keep the magnet stationary. C.

carlis lives 100 m away from his friend home what is his average speed if he reaches his friends home in 50s

Can an object accelerate yet neither sped up nor slow down?

What intermolecular force is responsible for the fact that ice is less dense than liquid water?

Which of the following statements are true? a. Positively charged objects attract other positively charged objects. b. Negatively charged objects attract other negatively charged objects. c.

You measure a watch's hour and minute hands to be 7.4 mm and 12.1 mm long, respectively. Part A In one day, by how much does the distance traveled by the tip of the minute hand exceed the distance traveled by the tip of the hour hand?

Describe the possible long term impact of a catastrophic event

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric

Technician A says that all friction and steel plates in a clutch pack should be replaced during and overhaul. Technician B says that the automatic transmission fluid cooler should always be flushed when a unit is rebuilt or replaced.