Identify the machines in which both a lever and a wedge are used.

-Shovel

-Scissor

-Bathtub knob

-Ladder

What is motion, terms used to measure motion, examples etc

Consider a rigid body that rotates but whose center of mass is at rest. a. Trueb. false: the rotational kinetic energy of the entire object is equivalent to the sum of the translational kinetic energy of each small piece of the object.

Electrical charges exist in the sea and in the air.

Harry has two types of materials of the same mass, one is a piece of paper, the other a copper ball. (a) explain why the copper ball hits the ground first when both are dropped near the surface of the earth even if they experience the same

When a covalent bond forms between two atoms, how many atoms have a full outer shell of electrons? A) one B) two C) zero D) It depends on what the atoms are.

Most volcanoes are located at A. transform boundaries. B. midocean ridges. C. convergent and divergent boundaries. D. hot spots.

What factors affect the speed of a wave?

What direction does air resistance act on an object that is falling straight down

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?