What structure do all of these elements have in common? boron, carbon, nitrogen, oxygen, flourine.

a) number of protons
b) numbers of electrons
c) number of energy levels
d) number of valence electrons

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?