Why are scientific theories modified, but seldom discarded?

1. An object in free fall will have an initial velocity equal to zero when: a. It is thrown vertically down b. It is dropped c. It's thrown up d. It is released horizontally

Name the parts of an atom and their corresponding charge

Which order shows decreasing momentum?

A standard of living that is below the minimum level considered adequate by society.

Kenneth ran a marathon (26.2 miles) in 5.5 hours. What was Kenneth's average speed? (Round your answer to the nearest tenth.)

Two football players collide on the field. Before the collision, their total momentum was 450 kgm/s to the north. What is their total momentum after the collision? A. More than 450 kgm/s north B. 450 kgm/s north C. Less than 450 kgm/s north D.

Jane and John Doppler effect

If you combine 430.0 ml of water at 25.00 °c and 140.0 ml of water at 95.00 °c, what is the final temperature of the mixture? use 1.00 g/ml as the density of water. s

While working out, a man performed 200 j of work in 3 seconds. What was his power?

A funnel-shaped low pressure closure