What does the release or absorption of energy indicate?

chemical change

physical change

physical and chemical changes

neither physical nor chemical changes

Why is the true surface of a perfect mirror invisible?

List some activities that influence health-related fitness

In the thomson model of the atom, where was the positive charge located?

Light is part of a collection of waves known as the what

You are pushing a dresser with drawers filled with clothing. What are two things you could do to reduce the friction between the dresser and the floor?

A potter's wheel of radius 16 cm starts from rest and rotates with constant angular acceleration until at the end of 32 s it is moving with angular velocity of 10 rad/s. what is the angular acceleration? answer in units of rad/s 2.

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?