A typical atom has a diameter of about 1.0×10−10m. Approximately how many atoms are there along a 2.0 −cm line?
Express your answer using two significant figures.

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?