A ball is rolling a 5 m/s down a hill the ball has 20 J of energy what is the mass of the ball

1.6kg

8kg

50kg

If a black hole itself emits no radiation, what evidence do astronomers and physicists today have that the theory of black holes is correct?

What is your acceleration while sitting in your chair. the latitude of corvallis is 44.4˚.?

Device that measures electric current

Describe the action and reaction force pairs involved when an object falls toward earth

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force? A. The pin pushes the bowling ball toward the right. B. The pin pushes the bowling ball toward the left. C.

Suppose a body has a mass of 60 kilograms and a velocity of 2 meters per second upward. What is the linear momentum?

Reflection and abssorption prevent some

Why is it important to change only one experimental variable at a time in an experiment?

A 0.0663 kg ingot of metal is heated to 241◦C and then is dropped into a beaker containing 0.395 kg of water initially at 25◦C. If the final equilibrium state of the mixed system is 27.4 ◦C, find the specific heat of the metal.

What does it mean when we say an atom has decayed?