Physics, 17.12.2019 00:31 RomoTussion
High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. this is like using a magnifying lens to focus the sun's light to a small spot that can burn things. as an engineer, you have designed a laser cutting device in which the material to be cut is placed 7.0cm behind the lens. you have selected a high-power laser with a wavelength of 1.06 \mum. (this distance and wavelength are both very typical values.) your calculations indicate that the laser must be focused to a 7.0\mum-diameter spot in order to have sufficient power to make the cut. what is the minimum diameter of the lens you must install? express your answer with the appropriate units.
Answers: 2
Physics, 22.06.2019 12:10
Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f
Answers: 2
Physics, 22.06.2019 17:00
If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.
Answers: 1
Physics, 22.06.2019 19:10
Due sun 06/09/2019 11: 59 pm skip navigation questions correct q 1 [1/1] correct q 2 [1/1] correct q 3 [1/1] untried q 4 (0/1) untried q 5 (0/1) untried q 6 (0/1) untried q 7 (0/1) untried q 8 (0/1) untried q 9 (0/1) untried q 10 (0/1) grade: 3/10 print version start of questions two cyclists, 42 miles apart, start riding toward each other at the same time. one cycles 2 times as fast as the other. if they meet 2 hours later, what is the speed (in mi/h) of the faster cyclist?
Answers: 1
High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot...
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