A block of wood 3 cm on each side has a mass of 27

g. what is the density of the block

Better climate prediction is important for which if the following reasons

Once an object enters orbit, what keeps the object moving sideways? A) inertia B) gravity C) centripetal force D) air resistance

A 500g object falls off a cliff and losers 100 J from its gravitational potential energy store. if the gravitational field strength g=9.8N/kg, how high is the cliff?

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

The number of protons in the nucleus is also the what?

Mazie stands on her kitchen floor. The coefficient of kinetic friction between her socks and the floor is 0.62, and the coefficient of static friction is 0.75. She has a mass of 42 kg. a.

The kinetic energy of an object is quadrupled. its momentum will change by what factor?

Combining which of the following substances with germanium will cause the germanium to emit free electrons? A. Bismuth B. Gallium C. Aluminum D. Indium

A 50.0-g Super Ball traveling at 25.0 m/s bounces off a brick wall and rebounds at 22.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.

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