Which one of the following substances is a liquid fuel used in rocket engines?

A. Liquid oxygen

B. Potassium perchlorate

C. Codium nitrate

D. Ammonia

What type of reaction occurs in the cores of stars to create their tremendous amounts of energy? a. fusion b. fission c. physical d. chemical

Where in the motion is the magnitude of the force from the spring on the object zero? Where in the motion is the magnitude of the force from the spring on the object a maximum? Where in the motion is the magnitude of the net force on the object zero?

Cell division results in two new cells. Which of these statements correctly describes the relationship of these two new cells and the parent cell?

The type of energy possessed by a fluid above its base level is

A positively charged metal sphere, A, is held close to but not touching and identical uncharged sphere, sphere B. Sphere A is now removed. After sphere A has been removed, sphere B is touched to an initially uncharged sphere, sphere C.

How was bohr atomic model similar to Rutherford's model

A rigid container filled with a gas is placed in ice. What will happen to the pressure of the gas? And what will happen to the volume?

A man is sitting on a 20 m height building and his mass is 50 kg. Calculate the mechanical energy.

Which of the following correctly describes which types of waves travel through which types of mediums? A) Transverse waves travel through solids, liquids, and gases.

Niko was hiking in the mountains when he found a spring, or a place where water naturally flows out of the ground. Where did the water in the spring come from? A. It is water that was squeezed out of an igneous rock when the rock changed. B.