Select all that apply.

There is no sound in the vacuum of space. Why?

Sound must travel through something that vibrates.

There is no energy in space.

There is no air to vibrate the human eardrum.

Space is too full of light energy.

if one of the classic nuclear physics experiments at the beginning of the 20th century an alpha particle was accelerated toward a gold nucleus and its path was substantially deflected by the coulomb interaction if the energy of the doubly charged

When two oppositely charged electrodes are immersed in a solution, positively charged ions are attracted to the negative electrode and gain electrons. The negatively charged ions are attracted to the positive electrode and release electrons.

A 1,700 kg car is being used to give a 1,400 kg car a push start by exerting a force of 140 N. The impulse on the smaller car during the 30.0 s of contact is + 670 kg•m/s. What is the impulse of the smaller car on the larger car?

Why are units of measurement useful?

Which term best describes the two substances that react to form salt?

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?