The spiral galaxy in the Andromeda constellation is about 2 * 1019 km away from us. How many light-years is this?

1. 3.48837 * 106 c.

2. 1.62791 * 106 c.

3. 7.39958 * 105 c.

4. 1.08668 * 107 c.

5. 2.11416 * 106 c.

6. 5.09514 * 106 c.

A pendulum has a period of 0.500. What is its length?

Which subatomic particle will you add or remove from an atom to create a new element? A - protons B - neutrons C - electrons

Which type of wave is not a light wave A) red waves B) radio waves C) ultra-violet waves D) sound waves

Why car speed is not considered as car velocity?

Bacteria is found in

Mass m1 is has an initial velocity v1i. Mass m1 collides with a stationary mass m2. The net external force on the two particle system is zero. If the two masses stick together after the collision, then the final speed vf of the two masses is:

What can one say for sure about element #99, Einsteinium (Es)) ? a) There's no such element! b) It is an alkali metal. c) It is radioactive. d) It has 253 neutrons. e) It increases one's 1. Q. slightly when swallowed.

What is the pH of neutral substance?

The velocity of a wave depends only upon the ... ?

When studying atoms, scientists can ignore the blank force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom