Physics

what needs to happen to the index of refraction to produce a rainbow
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Please help me how do elliptical galaxies typically compare to spiral galaxies?a. elliptical are redder and rounder b. elliptical are always much smaller c. elliptical are bluer and flattened d. elliptical are blue and roundede. elliptical galaxies are redder and flattened
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A 2000-kg ferris wheel accelerates from rest to an angular speed of 20 rad/s in 12 s. approximate the ferris wheel as a circular disk with a radius of 30 m. what is the net torque on the wheel
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The density of mercury is 13. 6 g/cmCalculate the mass of :a) 1 cm of mercuryb) 10 cm of mercury
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What is amplitude and phase in electrical and electronics circuit?
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Using a lever, a person applies 60 n of force and moves the lever 1 m. this moves a 200-newton rock at the other end by 0. 2 m
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Doug places a toy car at the top of the first hill and releases it. The car stops at point X. Which change to the model would allow the toy car to travel over all three hills?A. Add a loop after the tallest hill in order to maximize the kinetic energy of the car. B. Order the three hills from shortest to tallest so that the potential energy builds up according to the height of each hill. C. Order the three hills from tallest to shortest to provide the potential energy needed for the car to make it over each hill
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What kind of acceleration occurs when an object speeds up?
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A block of weight 500n is pushed up a slope by a force of 250n.assume there is no friction .calculate a.ama b.vr c.the length of the slope if the height of the slope is 10m.
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Choose which has more gravitational energyodiver with a mass of 450 n diving from a height of 20 feetdiver has a mass of 400 n standing at a height of 20 feetdiver with a mass of 450 n standing at a height of 20 feet
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Angle axc is 180. if angle axb is 132, what is the measure of angle bxc?
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Ice (the solid phase of water) has a lower density than water because:
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6 pointsA van traveling with constant velocity of 15 m-s1 passes a pedestrian crossing zone, where the speed limit is 10. M-5-1. Just as the van passes, a JMPD policeofficer on a motorcycle stopped at the crossing starts off in pursuit with constant acceleration of 3. 0 m. 5-2Save Answer(a) How much time elapses before the officer catches up with the van? (2 marks)(b) What is the officer's speed at that point? (2 marks)(c) What is the total distance each vehicle has traveled at that point? (2 marks)
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When removing a wool sweater, a static discharge of 6. 43 C dissipates 5. 72 10-3 J of energy. What voltage was involved?
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you pull a friend up a 50 m rocky slope with tension force in the rope of 490 N the slope is very steep what work will you need to do in order to pull up your friend
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A 0. 41 kg spike is hammered into a railroadtie. The initial speed of the spike is equal to1. 4 m/s. If the tie and spike together absorb 40. 4percent of the spikes initial kinetic energyas internal energy, calculate the increase ininternal energy of the tie and spike. Answer in units of J. please and thank you
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4.The "force" that moves electric charge carriers through an electric circuit isa superconductorresistanceAn10aMacBook Airs8currentvoltageDII8AEMA4F11F12
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A tourist, who weighs 705 N, is walking through the woods and crosses a small horizontal bridge. The bridge rests on two concrete supports, one at each end. He stops on the bridge. Assume that the board of the bridge has negligible weight. Where is he standing if the magnitude of the vertical force that a concrete support exerts on the bridge at the near end is 470 N?)one-fifth of the way along the bridge b)one-fourth of the way along the bridge c)one-third of the way along the bridge d)one-half of the way along the bridge f)one-sixth of the way along the bridge
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Two whistles emit sounds of wavelength 3.2 m and 2.9 m which produce a beat frequency of about? a) 2 hertz b) 3 hertz c) 4 hertz d) 7 hertz e) 11 hertz
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What is the speed of the wave of its frequency is 8.0 hertz?
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how does the epa calculator determine co2 for gas VS electric cars?
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If there is straight line on speed time graph, which of the following statements best describes A)the body is travelling at a constant speed. B) the body is slowing down. C)the body is accelerating. D) the body is stopped
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A mass of 10kg suspended on a steel rod of length 2m and radius 1mm what is the elongation of the rod beyond it's original length (Take E = 200*10^9 Newton per metre square
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A tank for storing liquid has a base of area 1. 5msquare what is the pressure on the base of the tank when it contain oil weighing 6000N
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