What is the frequency of an ultrasound that vibrates 30 000 times a second

The moon orbits a. Earth. c. Saturn. b. the sun. d. Mercury.

A hockey puck (m=0.2kg) is dragged by a force of 10N. What is it's acceleration

A factory wants to build a big tank to store chemicals. The tank will be near a river. Which of the following is a possible result of building a chemical tank?

What is the conclusion of the human impact? Give me at least 3 sentences.

What happens to wave speed as it moves from a medium of low density to one of high density?

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?