What factors may contribute to aging?

A. Cells stop dividing after 50 divisions.

B. Cells become more and more damaged.

C. Genes "tell" cells to stop dividing.

D. all of the above

The opposite poles of two magnets will do which of the following? A. attract one another B. repel one another C. attract or repel one another, depending on orientation D. not interact with one another

Q1. After three half-lives of an isotope, 1 billion of the original isotope's atoms still remain in a certain amount of this element. How many atoms of the daughter product would you expect to be present? Q2.

A person is standing upon the ground. Indentify the forces?

A 40kg animal is being pulled in a wagon on a level surface with an applied force of 800N at 16 degrees below the horizontal. If the kinetic friction is 600N, how fast does the object accelerate?

Can light be reflected and refracted at the same time? if so, give an example

What holds metal ions together?

Describe a situation when you might travel at a high velocity but with lo acceleration

Work occurs when A. an applied force results in movement of an object in the same direction as the applied force B. an object is subjected to balanced forces resulting in movement of the object C.

A 160 kilogram cannon fires a 30 kilogram cannonball with a speed of 45 m/s at an angle of 30 degrees with the horizontal. In what direction and at what speed does the cannon recoil?

A student uses an indicator to measure the pH of a solution. The indicator shows a pH of 7. What must be true of this solution? The solution contains neither hydronium ions nor hydroxide ions.