What do all elements in the same period on the periodic table have in common?

a. They have the same number of electrons.

b. They have the same number of protons.

c. They have the same number of neutrons.

d. They have the same number of orbitals.

how are the laws of superposition and cross-cutting relationships used to determine the related ages of rocks

A Newton is 1 kgm/s^2. Is this a fundamental unit or a derived unit?

List 3 indicators that a chemical reaction has occurred.

A circular space station has a diameter of 1,700 meter. The station rotates to simulate artificial gravity on the inside. What must the period be of the space station in order to simulate earths gravity?

1. A tennis ball is dropped from a second story window. It is in free fall, accelerating downward at a rate of 9.8 m/s2. At the exact same time, another person throws a tennis ball out the adjacent window with a horizontal velocity of 30 m/s.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall

Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be A) zero. B) the same as before.

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?