5)
Sun spots are believed to be most closely related to the sun's
A)
corona
B)
period of rotation
C)
magnetic field
D)
changing size

Which of the following statements are true of solids? a.the particles do not vibrate. b.the particles are in a fixed location. c.they have strong intermolecular forces between the atoms or molecules. d.the particles have less kinetic energy than those of liquids or gases.

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?