A child on a playground swing makes a complete to-and-fro swing each two seconds. the frequency of the swing is

What do all hydrogen protons and ions have in common

A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)

Suppose you drop a ball from an incline. Would changing the angle of the incline affect the ball's final velocity

4. An object (Object A) with a mass of 500 kg is traveling in a straight line from west to east at a constant velocity of 34 m/s.

Before beginning an experiment, Mrs. Wilson warns her science class not to drop the bar magnets on the floor. What is the most likely reason for Mrs. Wilson's warning?

Sound waves are mechanical waves in which the particles in the medium vibrate ina direction parrallel to the direction of energy transport. What is another name of the type of wave that transfers energy in this way?

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.