Using The graph to answer 12 and 13. Number 14, 16, and 17 answer don't have to use graph. Please Help ASAP. NO LINKS OR FILES. 12- In The graph Below what events do these arrows mark? What happens during these events?

13- What event appears to have had the greatest impact? Explain your answer in terms of the Graph

14- What are two possible reasons why large poulations of organisms die?

16- Why did new and existing aquatic organisms flourish during the Mesozoic era? Use The terms glaciers, Pangaea, and sea level in your explanation.

17- Approximately how long did Precambrian time last?

A- 0.5 Billion years

B- 3.5 Billion years

C- 4.0 Billion years

D- 4.25 Billion years

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

What is the final velocity of the initial velocity of 25 and -50?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.