A fragment of a collapsing gas cloud that comes to equilibrium with a central temperature of 4 million k will become a:

How many stars are there in the entire universe?

How far above the earth's surface will the acceleration of gravity be half what it is at the surface?

Two children playing on a spinning merry-go-round take turns riding and pushing. The merry-go-round slows, stops, and then speeds up again as the children switch places.

John walks to school in the morning and then walks home for lunch. The school is 1000 meters directly north of his house. After lunch, he goes back to the school and then to the field for track that is 30 meters north of the school.

Imagine you want to design a toy boat from a block of clay. What would you need to consider to make sure that your boat can float?

Can a machine be more than 100% efficient? yes no impossible to determine

A 290-kg flatcar 25 m long is moving with a speed of 7.0 m/s along horizontal frictionless rails. A 80-kg worker starts walking from one end of the car to the other in the direction of motion, with speed 3.0 m/s with respect to the car.

The electric field across the plates of a capacitor will decrease if the plate separation ___ and the potential is not changed. decreases increases

A crystalline substance that contains water

If his truck pulls forward with a force of 2,750 newtons and the weight of the trailer pulls backward with a force of 2,790 newtons, which of the following statement is true?