What effect, if any, does the development of new areas of science and technology have on theories?

Is the following sentence true or false? Two atoms of the same element can have different numbers of protons.

Name three situations in which force is created. Describe the cause of the force in each situation.

Spring tides are the lowest tides of the year. True False

A driver notices an upcoming speed limit change from 45 mi/h (20 m/s) to 25 mi/h (11 m/s). If she estimates the speed limit will change in 50 m, what acceleration is needed to reach the new speed limit before it begins?

What is most likely true of an atom with a mass of 15 amu?

Find the momentum of a 25 kg remote controlled car moving 4.0 m/s (Type your answer below, don't forget your significant figures and units!)

When a wave slows down it ... a. bends away from the normal b. bends towards the normal c. continues in a straight line

Select the statement that best describes how the forces relate. A. The object on which they are acting and the distance to that object determines the amount of force. B.

A block with m = 300 grams oscillates at the end of a linear spring with k = 6.5 N/m. (assume this is a top-down view and the block is sliding on a frinctionless surface;

What changes would a cold front bring to an area with warm, dry weather? extended period of rain or snow several days of gray skies dry air and sunny skies rain or thunderstorms