A 1000-kg car traveling at 66 m/s hits a 2000-kg car at rest and the two travel together after the collision. calculate the speed with which they move.

How are Saturn and Jupiter similar? Question 4 options: A. Both are made of ice and rock. B. Both rotate the opposite direction of other planets. C. Both are made of mostly nitrogen and oxygen. D. Both are made of mostly helium and hydrogen.

Which is the goal of science? A. to develop new technology B. to test hypotheses C. to expand knowledge D. to apply information

What can make a stronger electric or magnetic field?

What is difference between non uniform and uniform circular motion?

At the train station, you notice a large horizontal spring at the end of the track where the train comes in. This is a safety device to stop the train so that it will not plow through the station if the engineer misjudges the stopping distance.

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive

What does not affect the apparent brightness of a star?