Sound cannot travel through a vacuum. Explain why.

Name two conditions that are necessary for fusion to occur in the Sun's core.

Pen and ink manufacturers are asked to submit their new ink formulations to what database?

What meal can you get from standing on a hot sidewalk riddle answer?

How much time would it take for the sound of thunder to travel 2000 meters if the sound travels at the speed of 330 meters per sec

The drawing shows two planes each dropping an empty fuel tank. At the moment of release each plane has the same speed of 140 m/s, and each tank is at the same height of 3.98 km above the ground.

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.

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?