Physics

how much work do you have to do, in electron volts (ev), to move an electron from infinitely far away to the origin?
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a block is tied to a post with a cable and rotating with a constant velocity, on a horizontal smooth surface. what is the direction of its acceleration?
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a diffraction grating has 2,210 lines per centimeter. at what angle in degrees will the first-order maximum be for 500 nm wavelength green light?
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some materials feel colder than others because...
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An archer shoots an arrow at an 82.0 m distant target; the bull's-eye of the target is at same height as the release height of the arrow.(a)At what angle in degrees must the arrow be released to hit the bull's-eye if its initial speed is 40.0 m/s?
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If a model showed every object in the solar system, the model would be hard to understand. Scientists often choose to show certain characteristics in a model and leave out others. A characteristic that is left out is called a limitation of the model. Look again at the model where the size of the Sun compared to Earth and the Moon is accurately represented. Then, answer the question below. Which of the following are limitations of this model? Select all that apply.
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Mitchell dropped a basketball and watched it bounce a few times. It bounced highest the first time. The next time, it did not move asfast or bounce as high.What happened to some of the ball's energy?OA. It was changed into heat.B.It was transferred to Mitchell,OC. It was changed into lightOD. It disappeared.
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what is the general process by which a large diffuse cloud of gas turns into a star and surrounding planets?
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you are standing on a frictionless surface. you throw a heavy rock forward. will you accelerate, and if so, in which direction?
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1. a 0.42-kg object with an initial velocity of 3.40 m/s in the positive x-direction is acted on by a force in the direction of motion. the force does 6.50 j of work. what is the final velocity of the object?(neglect friction)
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what is the voltage across the 5 ohm resistor when the switch has been in position a for a long time?
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a wrench is used to tighten a nut. a 15n perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. what is the torque applied to the wrench?
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A 80kg stone falls from the top of the 360 meter cliff. Neglecting friction, how fast will the stone be moving just before it hits the ground?
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the electrostatic engines obtaining the highest degree of conversion of electric power into thrust and having the longest operational lifetime, are also called:
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on an asteroid that is twice as far as earth is from the sun, the strength of sunlight would be group of answer choices twice as great as on earth half as great as on earth a quarter as great as on earth the same as on earth
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two guys who weight the same are holding onto a massless pole while standing on horizontal frictionless ice. 1)if the guy on the left starts to pull on the pole, where do they meet?
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a photon in the rest frame of a star has a wavelength of 780 nm. an observer on earth measures it to be at a wavelength of 768 nm. the star is then:
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describe an experiment you could perform to determine if the mass of a cart has any effect on the amount of energy needed to overcome friction
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while a car travels around a circular track at a constant speed, its a) acceleration is non-zero and along the path b) acceleration is non zero and inward toward the center c) acceleration is zero d) acceleration is non-zero and outward from the center
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To be able to calculate the energy of a charged capacitorand to understand the concept of energy associated withan electric field.The energy of a charged capacitor is given byU= QV/2, where Q is the charge of the capacitor andV is the potential difference across the capacitor. Theenergy of a charged capacitor can be described as theenergy associated with the electric field created insidethe capacitor.In this problem, you will derive two more formulas for theenergy of a charged capacitor; you will then use aparallel-plate capacitor as a vehicle for obtaining theformula for the energy density associated with an electricfield. It will be useful to recall the definition ofcapacitance, C = Q/V, and the formula for thecapacitance of a parallel-plate capacitor,Co A/d, where A is the area of each of the platesand d is the plate separation. As usual, eo is thepermittivity of free space.
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Pls awnser I Need help
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suppose i drop a football from a tall building, and 4 seconds elapse before it hits the ground. neglecting air resistance, roughly how fast is the football moving upon impact?
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william herschel tried to locate the center of our galaxy by counting the number of stars in different directions. this did not work because
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the photo at right was taken through a specroscope. what color was the pigment extract used to produce this spectrum? what colo(s) did this extract absorb?
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