a squirrel with a mass of 4.5 kg sits on a branch that is 13 m off the ground. what is the gravitational potential energy? The acceleration of gravity is 9.8 m/squared

When do land breezes occur? A. at night B. during the day C. both day and night D. at thermal equilibrium

Describe Rutherford's contribution to the atomic model.

A wrench is used to tighten a spark plug. If the wrench handle is 0.20m and a force of 20N is applied, what is the torque applied? A) 0.01 Nm B) 0.4 Nm C) 4 Nm D) 10 Nm

A lightbulb converts 10 percent of the electric energy it uses into radiant energy

A weather map shows a high pressure system with circles around it. What does this mean? A) Areas Of Equal Altitude. B) Areas Of Equal Pressure. C) An Occluded Front. D) A Stationary Front

The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0∘ above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground.

Design an experiment (Fair Test) to find out what would be a good insulator for a dog house.

Which of these changes does a submarine encounter as it returns from the bottom of the ocean to the surface of the ocean? a. the amount of sunlight increases. b. the water temperature decreases. c. the amount of plants decreases. d.

Why do some elements have symbols that don't use letters in the element's name?

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.