A heat engine with a thermal efficiency of 45 percent rejects 500 kj/kg of heat. how much heat does it receive

Which type of property of matter can be observed without changing the composition of the substance? Question 2 options: chemical properties physical properties irreversible properties reversible properties

A hiker walks with an average speed of 1.2 m/s. what distance in kilometers does the hiker travel in a time of 1 hour

People often live on barrier island even though there not permanent why aren't they permanent

A vertical piston-cylinder device contains a gas at a pressure of 100 kPa. The piston has a mass of 5 kg and a diameter of 12 cm. Pressure of the gas is to be increased by placing some weights on the piston.

If an object has a constant acceleration, it must be changing velocity at the same rate over and over again ... True False

The conversion of thermal energy into mechanical energy requires a a. thermometer. b. heat engine. c. vaporizer. d. thermostat.

1. Suppose you give a shopping cart a push and it begins t give a shopping cart a push and it begins to roll across the parking lot.

A 0.40-kg cart with charge 4.0 x 10-5 C starts at rest on a horizontal frictionless surface 0.50 m from a fixed object with charge 2.0 x 10-4 C. When the cart is released, it moves away from the fixed object.

Explain why, if you go to the moon, your weight would change but your mass wouldnt

How much energy do individual photons of 450 nm light have?