Which of the following is an element?

A. Water

B. Carbon Dioxide

C. Oxygen

D. Ammonia

How does the acceleration due to gravity relate to the mass of an object and the distance from Earth?

All the matter, mass, and time that exists and has ever existed is contained in which of the following? the sun the planets the universe the milky way

Which statement defines an ore? Rock broken down to become part of the topsoil. Rock dug out from the earth to use in construction. Rock dug out from the deep inside earth and refined. Rock exposed as a result of loss of topsoil.

High energy waves have short wave lengths, true or false?

You are standing against the wall near a corner of a large building. A friend is standing against the wall that is around the corner from you. You can't see your friend. How is it that you can hear her when she talks to you?

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.