The factor being changed by the person doing the experiment in a controlled study is called the ...

A) data.

B) controlled variable.

C) dependent variable.

D) independent variable.

A train car with mass m1 = 590 kg is moving to the right with a speed of v1 = 7.3 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at vf = 4.7 m/s.

Which of these quantities needs to have a direction associated with it? Select one: a. force only b. force and acceleration c. mass only d. acceleration only

Dan shoots a hockey puck. It travels away from you in a straight line at an average velocity of 20m/s. Where is it after 5 seconds after he shoots it?

Determine the centripetal acceleration an object has when object has when traveling at a constant speed of 20m/s around a circle with radius of 2m

Tiny molecules of gas are not attracted to one another by the force of gravity because they are too small. True False

How far away is a cliff if an echo is heard 0.486 s after the original sound? Assume that sound traveled at 343 m/s on that day.

Rafael swings a baseball bat with a force of 25 N. The baseball bat exerts a force of 5 N on the baseball. What is the mechanical advantage of the baseball bat? The mechanical advantage of the baseball bat is

Minerals such as sulfur can sometimes be identified by colors, true or false.

How does the number of each type of particle in a sodium ion compare with the number of each type of particle in a sodium atom?

Calculate the work done when a 10 N force pushes against a cart 4.0 m