Does the number of particles change as the substance changes its state

A child has legs that are each 0.500 m long. What is her maximum walking speed? A. 2.21 m/s B. 2.19 m/s C. 2.6 m/s D. 5.58 m/s

Which astronomical bodies would most likely be the largest?

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

All of the following are benefits to getting involved with activities outside of school except

What is currently the most supported theory about the future of the universe A.) the universe could remain exactly as it is today B.) the universe may continue to expand C.) stars could burn out, causing the universe to become dark and cold D.

An automobile battery is an example of a a. wet cell. b. dry cell. c. thermocouple. d. fuse.

An object has a mass of 13.5 kilograms. What force is required to accelerate it to a rate of 9.5 m/s2?

How is work related to force and displacement?

Approximately how many news cases of STIs occur in the United States each year? Sexually transmitted infections are widespread in the United States. Approximately half of new cases occur in which age group?

How does mass effect potential and kinetic energy on a roller coaster?