if you blow up a ballon, tie it off and release it, it will fall to the floor. why does it fall instead of float?

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force exerted on a 0.0300-kg bullet to accelerate it to a speed of 600 m/s in a time of 2.00 ms (milliseconds) ?

A certain car traveling in a straight line path has a velocity of + 10.0 m/s at some instant. after 3.00 s, its velocity is + 6.00 m/s. what is the average acceleration of the car during this time interval?

Which of the following astronomers supported the Sun-centered system?

Your high-fidelity amplifier has one output for a speaker of resistance 8 Ω. How can you arrange two 8-Ω speakers, one 4-Ω speaker, and one 12-Ω speaker so that the amplifier powers all speakers and their equivalent resistance when connected

An accepted and universally true explanation of observed facts is a

A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?

This is a machine consisting of two wheels of different sizes that rotate together. It is a modified lever.

A source from which organisms generally take elements is called a/an A. biotic community. B. reservoir. C. exchange pool. D. food web.

Jill has a mixture of sand and iron fillings. The mass of the mixture is 250 g. Jill uses a magnet to seperate the two substances. Then she measures the mass of the sand as 150 g what should be the mass of the iron fillings

Ca (OH) 2 is__ An acid A base A salt