If element X has 39 protons, how many electrons does it have?

What can be predicted about the angle of reflection?

How do we know the age of the canyon diablo meteorite?

Which source of information is generally considered credible?

How do we know that water dissolves glue?

In an incompressible three-dimensional flow field, the velocity components are given by u = ax + byz; υ = cy + dxz. Determine the form of the z component of velocity. If the z component were not a function of x or y what would be the form be?

Peat is actually the early stage of

Explain how electric current is able to flow.

What is the angle between a rigid object and the force applied to it that yields torque using the equation T=Fd?

What is the difference between speed and velocity and give an example.

Water flows over a section of niagara falls at the rate of 1.2x10^6 and falls 50.0 m. how much power is generated by the falling water