Which of the following materials is necessary to stop an alpha particle? a. three feet of concrete c. single sheet of aluminum foil b. three inches of lead d. single sheet of paper

Which of the following stars is likely to appear the brightest? The star with the least energy The most massive star The farthest star The coldest star

What order do these steps go in to form metamorphic rock? 1.) magma flows between existing rocks 2.) high pressure compresses the grains in the rock 3.) the magma cools to form a rock

A long jumper leaves the ground at an angle of 22.5 ∘ measured from the horizontal, and at a speed of 11.0 m/s. How far does he jump? Hint: first determine how long he is in the air, which is twice the time it takes him to reach his maximum height.

The Sun transfers light energy that is transformed into what kind of energy in plants?

A northfield raider defensive back runs 20 m in 2.5 s what's the average speed

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?