You and friend run up a fight of stairs that is 30 m high. Both of you reach the top in 12 seconds. Your weight is 570 N and your friend weights 620 N. Which of you has more power? Show all work

The speed with which force is developed by skeletal muscles is determined by the

A 48 kg girl is standing on a chair. What is the force exerted by the chair?

What is the correlation between wire guage and electromagnet strength

Which of the following stars would be the most luminous? 2. Yellow star 3. Red star 4. Blue star 5. Orange star

About how much longer can the Sun continue to generate energy by nuclear reactions in its core?

How many (whole number of) 91 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? A metric ton is 1.000 * 103 kg. Answer in units of people.

Cho is using technological design to build a clock based on the apparent motion of the Sun. Which of the following would be the best measure of success for Cho's clock? A. Cho's clock works even at night. B.

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. a) The car is decelerating and its acceleration is positive.

What are the moons of the outer planets made of, and how is their composition different from that of our Moon?

What is the main difference between geocentric and heliocentric models of the solar system