Does an Atom of different elements have different number of protons

Determine the deBroglie wavelength for an electron moving at 7.3 x 107 m/sec. A. 1.0 x 10-11 m B. 5.1 x 104 m C. 5.9 x 10-23 m D. 2.9 x 10-7 m

Knowing the definition of work as used by physicists, how can the work done on an object be equal to zero? a. The force and distance are perpendicular. b. The force is zero. c. The distance is zero. d. all of these e. none of these.

If the speed of light in a vacuum is twice that of the speed of light in a given material, what is the index of refraction for that material?

What piece of sports equipment is aerodynamic

Suppose an object is accelerated by a force of 100 N. Suddenly a second force of 100 N in the opposite direction is exerted on the object, so that the forces cancel. The object a. is brought to rest rapidly. b.

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