Which of the following are good ways to test whether a solution is an acid or a base? tasting it litmus paper phenolphthalein touching it

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon