A 0.50g leaf falls from a branch 4.0m off the ground to a bird's nest 2.5m off the ground. How much gravitational potential energy did the leaf loose?

A dc motor uses what to move wires A. Differences in electric resistance B. static electricity C. An electromagnetic field D. Flowing protons

When connected to a 120 V outlet, a light bulb consumed a power of 50.4 watts. What is the current flowing through it?

A rock displaces 1,500 mL of water. The volume of the rock is: A) 1,500 cm³ B) 15 cm³ C) 150 cm³ D) 0.0015 cm³

On average, the Moon is three hundred and eighty thousand km (kilometers) from the Earth. How is this quantity expressed as a number?

Which of these is the best example of translational motion? A. a coin spinning on a desk B. a leaf blowing across the field C. a car in a parking lot with its engine running D. a ballerina standing on one foot

How long does it take for light from a star that is 8 light years away to reach Earth? Question 7 options: 8 earth minutes 16 earth minutes 8 earth years 16 earth years

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

A small kid sits on a bike (Anita). A bigger and stronger person (Jamy) pushing the kid so that the kid starts speeding up. (neglect friction). Mark all correct statements about the forces between them. A.