Which best describes a chemical reaction

If someone wants to see around 90 * corner, at what angel would they have to place a mirror

Terry, a 70-kilogram tailback, runs through his offensive line at a speed of 7.0 m/sec. Jared, a 100-kilogram linebacker, running in the opposite direction at 6.0m/s, meets Jared head-on and "wraps him up." What is the result of this tackle?

As the exposed surface area of a food increases, the A. Cooking time remains constant B. Cooking time increases C. Cooking time decreases D. Mass increases

A 750-newton person stands in an elevator that is accelerating downward. The upward force of the elevator floor on the person must be (1) equal to 0 N (3) equal to 750 N (2) less than 750 N (4) greater than 750 N

I'm which medium would sound travel faster? A) across a room B) in a swimming pool C) through outer space D) through a rail road track

The probability that a battery will last 10 hr or more is 0.8, and the probability that it will last 15 hr or more is 0.11. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more

What is the sum of 9260 and 3240? Express your answer numerically to at least three significant figures.

What could you do if the plant is placed in your community and later leads to pollution beyond the amounts allowed by the EPA?

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences