Day and night are caused by

a. the tilt of Earth's axis.

b. Earth's revolution around the sun.

c. eclipses.

d. Earth's rotation on its axis.

You are sitting on a deck of your house surrounded by oak trees. You hear the sound of an acorn hitting the deck. You wonder if an acorn will do much damage if instead of the deck it hits your head. Let the mass of the acorn be 3.5 g.

The Behavioral Science Unit (BSU) is a part of what agency?

Select all of the answers that apply. Which statements are true regarding the scientific evidence supporting the big bang theory? Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.

How much work is done on a a 60 n box of books that you carry horizontally across a 6 m room?

The light bulbs in an office building give off tremendous amounts of heat. Since heat is a form of energy, this heat could be trapped and used to offset our need for electricity, thus saving energy and money. True False

How many turns are in the secondary coil of a step up transformer that increases voltage from 30 V to 150 V and has seven turns in the primary coil?

What is a nuclear bulge? a) The bulging corner of a spiral galaxy consisting of gas in the shape of a spiral sphere that circles a galaxy b) The bulging center of a spiral galaxy consisting of debris in the shape of a flattened sphere that circles a

Your friend of mass 50 kg can just barely float in fresh water. Calculate her approximate volume.

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?

Why is there controversy to the opinion that human contribution of carbon dioxide to the atmosphere is cause warming