Can sound be produced in a vacuum? Explain?

Explain in a simple way, how water erosion by groundwater can form a cave?

What temperatures will you find the fourth state of matter?

Two forces A and B act on an object in opposite directions. A is bigger than B. What is the net force acting on an object?

A satellite of mass?=238 kg is in circular orbit around the Earth at an altitude above the earth's surface equal to the earth's mean radius (6370 km). At this distance, the free-fall acceleration is?/4. What is the satellite's orbital speed (m/s) ?

If a prairie is burned by fire, what would happen to the animals that eat grass? A.) They would have an increase in their food. B.) They would have a decrease in their food. C.) They would stay on the prairie. D.) They would grow in their population.

What is the reason for Mary's resemblance to her mother. Mary's relatives and friends feel she had her mothers feature

Is a balance scale used to describe how much matter is in an object

At distances greater than 2 femtometers, the nuclear strong force is stronger than (select all that apply): gravity electromagnetic forces nuclear weak force none of the above

Identifying the Functions of Parts of the Ear Which part of the ear changes sound to a signal that the brain can understand? Which part of the ear carries the signal to the brain?

Which tool would a scientist use to find the mass of an object?