Which is an element?

A. air

B. water

C. oxygen

D. carbon dioxide

Where does most star formation occur in the milky way today?

A ray of light is incident on a plane mirror at an angle of 40 degrees with the mirror surface. What will be the angle of reflection? a) 40 degrees b) 50 degrees c) 90 degrees d) 150 degrees

Why is chopping carrots a physical change?

Scientists believe the universe follows a set of "rules" known as?

Two similar gold spheres both have a charge of q. The centers of the spheres are separated by a distance of r. Which of the following would result on the spheres if you multiplied Force (F) by two? A.

Why do space suits need to be pressurized?

Why do comets have tails?

The main characteristic of all vertebrates is the presence of a. cartilage b. a large brain c. a backbone d. an exoskeleton I got it. The answer was B

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?