If you lift a 20kg barbell 4.0 meters off the ground, how much work did you do?

Are rocks made of matter?

Choose the appropriate description for an electron. 1. negative charge, large relative mass, and found outside the nucleus 2. positive charge, large relative mass, and found within the nucleus 3.

Symbiotic relationships can be found in any environment in the world. True False

Which property describes the amount of energy that flows past a given area per unit of time?

d. What do the results suggest about the ability of touch therapists to select the correct hand by sensing energy fields? A. Since the confidence interval is not entirely above 0.

A star has a mass of 1.36 x 1030 kg and is moving in a circular orbit about the center of its galaxy. the radius of the orbit is 2.1 x 104 light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.1 x 10-15 rad/s.

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?