Which label belongs in the area marked x? radiation is x

a. must involve temperature differences between substances or objects

b. only occurs when molecules are in direct contact

c. involves the movement of fluids based on density differences

d. can occur where there is little or no matter

Which accurately compares concave and convex lenses?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Which composition of water moves to begin a deepwater current?