3) The atomic number of magnesium is 12. This means that its nucleus must contain

A) 6 protons and 6 neutrons.

B) 6 neutrons and 6 electrons.

/C) 12 neutrons and no protons.

D) 12 protons and no electrons.

Which of the four fundamental forces is mainly responsible for contact forces? A. gravity B. weak nuclear force C. electromagnetic force D. strong nuclear force

How could you use the barometer to determine the height of a building?

Is the moon blocking the sun an eclipse of the sun

What is the name of family for group one

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting

A submarine that is in the sea what principle is that

1. It takes 26.5 N to pull a 72 kg sled across snow. What is the coefficient of friction? 2. A 565 N rightward force pulls a large box across the floor with a constant velocity of 0.75 m/s. If the coefficient of friction is 0.

A person holds onto an object for 2 minutes, but doesn't move the object. Is work done on the object?

Which two vectors add together to give a resultant with the smallest magnitude, and which two vectors add to give a resultant with the largest magnitude? in each case specify the magnitude and direction of the resultant?

The largest velocity reached by a falling object is its