Before a star is born, the matter that will become the star exists as a

A bright, explosive supernova

Bred giant

C black hole

D cool, dark nebula

Describe the earths formation from a nebula

What is a newton? a. the time it takes to move 1 kilogram b. the force it takes to change the speed of 1 kilogram by 1 m/s in 1 second c. the speed it takes to move 1 kilogram mass in one hour

What are atoms mostly consisted of in terms of protons, electrons and neutrons?

What does it mean to say that current and voltage in a circuit are directly related?

The combination of sperm, sugars, chemicals, and mucus is: a. semen b. urine C. spermatozoa d. all of the above

A rod of mass M and length L can rotate about a hinge at its left end and is initially at rest. A putty ball of mass m, moving with speed V, strikes the rod at angle θ from the normal and sticks to the rod after the collision.

A satellite with a mass of 2,000 ㎏ is inserted into an orbit that is twice the Earth' s radius. W hat is the force of gravity on the satellite? The radius of the Earth is 6380 km, and the mass of the Earth is 5.98 X 1024 kg a. 2,000 N h.

our canisters contain helium gas. If all the canisters had the same amount of particles, which canister would have the fastest moving particles?

The acceleration due to gravity is

How does gravitational force and electric force compare?