Which is an example of radiation? a. an ice pack is placed on a knee, and the knee cools down. b. a rock is warmed by an ultraviolet heat lamp. c. hot coffee in a mug causes the mug to warm up. d. cold salt water sinks to the bottom of the ocean.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2