When someone throws a ball the action force is the person pushing on the ball. What is the reaction force?

What does it mean axis 1-1'?

Which of the following best summarizes what we mean by dark matter? Matter for which we have theoretical reason to think it exists, but no observational evidence for its existence.

If two waves are out of phrase with each other and are moving through the same medium what will they undergo

A scientist observes an increase in the rate at which water moves from the hydrosphere to the atmosphere at a particular location. Which of these conclusions about the location is most likely to be correct?

A 10 kilogram mass is lifted to a height of 2 meters what is its potential energy at that height

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?

The period of a simple pendulum is 3.8 s. the length of the pendulum is doubled. what is the period t of the longer pendulum? t = s

True or false - sound waves can travel across outer space.

In which one of the following locations can a person hear the echo of a sound? a. At least 33.2 meters behind the reflecting surface b. Less than 16.6 meters in front of the reflecting surface c. Less than 33.2 meters behind the reflecting surface d.

F an electron fell to a lower orbit or energy level, energy would be A. created. B. emitted. C. absorbed. D. transferred.