A typical solar flare lasts only a few days
Indicate whether the statement is true or false
FALSE
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A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave moves, its wavelength:
1.increases. 2.decreases. 3.stays constant.
If a photon's frequency increases, its wavelength
A. will increase. B. will decrease. C. will not change.
A force that determines the chemical properties of an atom is
A) a friction force. B) a nuclear force. C) a gravitational force. D) an electrical force. E) none of the above
An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. If the two objects stick together, what is the speed of the combined object, of mass 4m, after the collision?
1.0 2.v/2 3.v 4.2v