What is the critical angle - easy definition

Find the sum of two vectors: x = 5m 60° and y = 6m 150°

What happens when a ray of light is directed at a mirror, a glass block and a prism?

What does the color of a star determine

Why does a ice cube metl when held in a person's hand?

Suppose you "dig a hole" 52 feet deep and place a baseball machine in the hole, so that the balls fire out at 96 ft / s and land on the ground outside the hole. What is the velocity of one of these baseballs when it hits the ground?

The force of air resistance acts to oppose the motion of an object moving through the air. A ball is thrown upward and eventually returns to the ground.

The temperature of a substance during an experiment can be modeled by the function f (x) = - 7.5cos (πx30) + 31.4, where f (x) is the temperature °c and x is the number of minutes into the experiment.

Which of the following are good conductors? A. A rubber tire B. A penny C. A newspaper D. An aluminum soda can E. Water F. Air

Ideentify the two atmospheric layers that contain air as warm as 25 degrees Celsius.

A defensive tackle picks up the 0.5kg football to a height of 0.8m in 0.25s ... 1. calculate the work done 2. calculate the power generated