When you are finished with the experiment, complete the following data analysis and submit your answers. 1 Determine the volume of the box and the block 2. Determine the ratio of the block to the box volume of block volume of box (L)(W)H (L)(W)CH 1. Multiply this number by 100 to turn it into a percent 2. Complete this statement The volume of the blockis percent of the volume of the box 3. Determine the ratio of the number of hits to the number of shots: number of hits 100 shots 1. Multiply this number by 100 to turn it into a percent 2. Complete this statement: The block was hit percent of the time 4. Compare the results of step 2 to the results of step 3. Are the percentages similar? 5. Write a conclusion discussing the following items 1. Based on your findings do you think Rutherford's hypothesis was reasonable? 2. Restate Rutherford's hypothesis and describe how you tested it 3. State whether your results support the hypothesis. If they do not can you suggest some error in experimental procedure (other than general human erron) that might explain it? 4. Finally, explain how this experiment confirms the nuclear model of the atom and the idea that most of the atomis empty space

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

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s