On what basis are different photons to be distinguished?

A. Their energy levels

B. The atoms they come from

C. Their masses

D. Their speeds

A baseball is thrown a distance of 20 meters what is its speed if it takes 0.5 seconds to cover the distance?

Suppose a child drives a bumper car head on into the side rail, which exerts a force of 3400 N on the car for 0.400 s. (Assume the initial velocity is in the positive direction.

6. Contaminated rags are recommended for disposal in landfills. A) True B) False

Trace the path of energy from the sun to mechanical energy in an organism

Which best describes the relationship between heat, internal energy, and thermal energy? Internal energy is heat that flows, and heat is the part of thermal energy that can be transferred.

A 5kg rock and a 10kg rock are dropped from a height of 10m?

A train accelerates from a station with a = 1.841m/s? Upon reaching a speed of 23.52m/s the train travels at a constant velocity for a period.

A what is used to measure air pressure.

What is 6.9*10to the 7th power

Un lote de construcción rectangular mide 100 metros por 150 metros. Calcula el área de este lote en yardas cuadradas. (20 puntos)