A monochromatic beam of light has a frequency

of 7.69 * 10^14 hertz. What is the energy of a

photon of this light?

(1) 2.59 * 10^-40 J (3) 5.10 * 10^-19 J

(2) 6.92 * 10^-31 J (4) 3.90 * 10^-7 J

Which of the following processes have contributed to the evolution of the Earth over time select all that apply? a the motion of crustal plates b the rock cycle c radioactive dating d erosion e deposition

What happens to an object's velocity if there is work done by a friction force? Why?

If the accepted value is 343 m/s, what is the best description of Tonya's data? A. accurate but not precise B. precise but not accurate C. both accurate and precise D. neither accurate nor precise

Which system consists of nerves that initiate communication?

Why does a gun recoil when a bullet is fired?

If you lived downhill from a volcano and lava started to flow toward your home what could happen?

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed.

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.

What are the components of earths life support system