What is the evidence that a large fraction of the matter in the universe is invisible?

A 300kg motorboat is turned off as it approaches a dock and coasts towards it at. 5 m/s. Isaac, whose mass is 62 kg jumps off the front of the boat with a speed of 3m/s relative to the boat. what is the velocity of the boat after Isaac jumps?

Can a magnetic force be produced by an electric current?

How would you describe a fossil that was discovered in a rock at the base of a cliff to a fossil in a rock found at the top of a cliff?

4. Going down the freeway you notice your tachometer reads 4,000 RPM. a) Convert this frequency into RPS? b) Use your answer from 'a' to find the period of rotation (how long it takes your engine to spin just once) ? Answer in seconds.

Name each planet in the solar system

Which is an example of transfroming potential energy to kinetic

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away. A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.