When galaxies move away from us they appear to have a "red shift" in color. Explain why this happens.

In your every day life you come across a range of motion in which, a) Acceleration is in the direction of motion b) Acceleration is against the direction of motion c) Acceleration in uniform d) Acceleration in non-uniform

Suppose a vector v makes an angle theta with respect to the y axis, what could be the x and y components of the vector v

On the 1-to-10-billion scale, about how far is it to the nearest stars besides the sun? on the 1-to-10-billion scale, about how far is it to the nearest stars besides the sun?

A feather, a marble, and a cannonball are dropped from the same height at the same time. If they were in a vacuum, which one would hit the ground first? O A. The cannonball would hit the ground first. O B. The marble would hit the ground first. O C.

Which is occurring when work is being done? energy is being reverted. energy is being decreased. energy is being increased. energy is being transferred.?

How many additional valence electrons does fluorine need to have a full valence shell? A. One B. Two C. Eight D. Seven

If you double the radius of the earth and keep the mass of the earth the same, the acceleration of gravity on the surface of the earth will be approximately ...

In an electron dot diagram the symbol for an element is used to represent

The space shuttle undergoes an acceleration of 53.9 m/s2. How fast is it traveling at the end of 55.2s

Which of the following has the greatest amount of kinetic energy a) slice of pizza b) a person at the top of the stairs c) wind d) a book on a table