Which of the following is an example of radiation?
a. a metal spoon becomes warm after being set in a pot of boiling water.
b. warm water rises because it is less dense than cool water.
c. pancake batter cooks quickly after being spooned onto a hot griddle.
d. our atmosphere is constantly being heated by the sun.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc

How do you know how many valence electrons an atom has?

Avector a⃗ has a length of 8.6 m and points in the negative x direction. find the x component of the vector −3.7a⃗ .