A machine supply energy at a rate of 4000 W and does used to work at a rate of 3760 W what is the efficiency of the machine?

Which type of mirror causes beams of light to spread apart A) flat mirror B) concave mirror C) diverging mirror D) converging mirror

Three liquids with different densities are dumped into a glass. What do you expect to see? A. The liquids will float depending on buoyancy B. All three liquids will combine to equal the density of the water C.

A siren mounted on the roof of a firehouse emits sound at a frequency of 900 Hz. A steady wind is blowing with a speed of 15.0 m/s.

Which state of matter has the greatest distance between the individual particles

An atom that has an excess positive or negative electrical charge caused by the loss or addition of an electron is called a (n)

The puzzle box is traditionally associated with the work of

A 0.95-kg sample of water at 11°C is in a calorimeter. You drop a piece of steel with a mass of 0.39 kg at 212°C into it.

Let the magnitudes of two displacement vectors be 4 m and 8 m, respectively. If the two vectors are added, the magnitude of the resultant vector. A. is exactly equal to 4 m. B. is exactly equal to 12 m. C. is greater than 12 m. D.

justin pushes basket of toys with 50N of force for 3 meters in 100 seconds. how much work did he do on the basket

In general, what can be said about metals.