In real machines, efficiency is always

A 4-kilogram ball moving at 8 m/sec to the right collides with a 1-kilogram ball at rest. After the collision, the 4-kilogram ball moves at 4.8 m/sec to the right. What is the velocity of the 1-kilogram ball?

There are three main types of clouds. the high cirrus clouds, the layered stratus clouds, and what third type of puffy clouds?

An apple is placed on a kitchen counter. How could the movement of the particles in the apple be decreased? A. Put it in the refrigerator B. Eat it for dinner C. Put it in the microwave D. Put it in the sunlight.

In a geocentric model of the universe, the planets and the sun move around a central Earth. True False

A tuba may be treated like a tube closed at one end. If a tuba has a fundamental frequency of 40.4 Hz, determine the first three overtones. Use 343 m/s as the speed of sound in air.

Why do windows have two panes of glass separated by a layer of air

Which branch of psychology focused on subjects such as conditioning

How are nuclear chain reactions controlled in nuclear power plants?

The intrapleural pressure is - 4 mmHg relative to atmospheric and the transpulmonary pressure is 5 mmHg relative to atmospheric.

A hot-air balloon is 150 feet above the ground when a motorcycle passes directly beneath it (traveling in a straight line on a horizontal road). The motorcycle is traveling at 40 mph.