A pendulum makes 40 vibrations in 20 seconds. Calculate the period?

How does the endocrine system affect behavior?

What is the speed or rate of a glacier erosion?

Which of the following would be a good question that could be scientifically investigated? A. What is the correct way to pursue happiness in life? B. Can play the piano at a shower tempo improve the sound quality? C.

If the sun disappeared what would happen to the path the planets follow?

How does a battery work? explain

Objects can be accelerating and traveling at constant velocity at the same time. True or False

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.