How to find the density of an irregular object that floats?

Why does a compass not respond when held near a wire carrying alternating current? a. The field changes direction 120 times a second, which is too fast for the compass needle to respond. b.

What is the best description of the acceleration of an object?

What is tension? a. stress squeezing an object c. stress breaking an object b. stress pulling an object d. stress releasing an object

The half-life (t1/2) for a chemical reaction is the time it takes for the concentration of reactant to decrease to one-half its initial concentration. For a first-order reaction, the half-life is a constant at a given temperature.

Which measurement has three significant figures? 0.015 m 105 m 150 m 1.050 m

What is the spine also known as

If a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is his average momentum?

Two lamps one rated 40W at 220 V and the other 60W at 220 V are connected in parallel to the electric supply at 220V.

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevator?

The entropy of a hot baked potato decreases as it cools. is this a violation of the increase of entropy principle? explain.