Dust reddens starlight because it a. emits mostly in the infrared due to its cold temperature. b. re-emits the light it absorbs at red wavelengths. c. preferentially affects light at visible and shorter wavelengths. d. is made mostly of hydrogen, which produces the red h-alpha emission line. e. primarily moves away from earth.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.