How does radiation differ from conduction? A. Radiation can move through empty space to transfer heat; conduction cannot.
B. Radiation needs a medium in order for heat to transfer; conduction does not.
C. Radiation requires objects to have direct physical contact; conduction does not.
D. Radiation transmits heat by circulating particles in an object; conduction does not.

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

Most short-period comets do not have randomly oriented orbits because