If steam enters a turbine at 600K and is exhausted at 400K, calculate the efficiency of the engine.

What type of acceleration does an object moving in circular path with constant speed experience

Select the correct answer. A body travels 10 meters during the first 5 seconds of its travel, and it travels a total of 30 meters over the first 10 seconds of its travel. What Its average speed during the time from t = 5 seconds to t = 10 seconds? A.

What is the surface temperature of a distant star having a peak wavelength of 475 nm?

What is the observed frequency of a siren with a frequency of 440 Hz moving towards you at 50 m/s? The speed of sound is 330 m/s.

If a body goes from 10 m/s to 50 m/s in 8 seconds, what is it's acceleration?

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?

A batter hits a baseball with a bat. The bat exerts a force on the ball. Does the ball exert a force on the bat?

In a nuclear power plant, the temperature of the water in the reactor is above 100°C because of what?