Answers edited by Daniel W.
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Question #9b08b
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What properties of light that can best be explained by the wave theory. What other properties can be explained by the particle theory?
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How the doppler effect is used in medicine?
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Person A travels up in an elevator at uniform acceleration. During the ride, he drops a ball while Person B shoots an arrow upwards directly at the ball. How much time will pass after Person B shot the arrow before the arrow hits the ball?
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An object with a mass of #4 kg#, temperature of #240 ^oC#, and a specific heat of #15 J/(kg*K)# is dropped into a container with #15L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?
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How does an astronomical unit differ from a light year?
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A ball with a mass of #3 kg # and velocity of #5 m/s# collides with a second ball with a mass of #7 kg# and velocity of #- 1 m/s#. If #25%# of the kinetic energy is lost, what are the final velocities of the balls?
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A bolt is to be tightened with a torque of 8.0 N*m. If you have a wrench that is 0.35 m long, what is the least amount of force you must exert?
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Why do electric lines of force never cross?
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Using the law of reflection, explain how powder takes the shine off of a person’s nose. what is the name of the optical effect?
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Question #22336
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Question #886e9
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Question #8f92d
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A resting car starts accelerating with a = 5.0 m/s^2, then it goes uniformly, and finally, decelerates at the same rate (a) and comes to a stop. The total time of motion equals t = 25 s. The average velocity is v= 72 kmph. How long does it move uniformly?
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How can I calculate the ideal gas law equations?
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Question #67f33
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How does physics relate to music?
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In Figure (1), a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.47 kg) and embeds itself in block 2 (mass 2.02 kg). The blocks end up with speeds v1 = 0.590 m/s and v2 = 1.45 ?
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Question #5a91f
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A #5 L# container holds #15 # mol and #6 # mol of gasses A and B, respectively. Every three of molecules of gas B bind to two molecule of gas A and the reaction changes the temperature from #360K# to #210K#. By how much does the pressure change?
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How does kinetic molecular theory explain the Charles' law?
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If a #2 kg# object is being constantly accelerated from #0m/s# to #15 m/s# over # 6s#, how much power is being applied at #t= 3 #?
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What is the cue ball's momentum after the collision? What is the 5-ball's kinetic energy after the collision? What was the cue ball's momentum before the collision? What was the speed of the cue ball before the collision?
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What is the meaning of "Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit".?
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Question #3eb9d
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If the speed of rotation of AC generator is made four times of its initial value then what is the percentage increase in induced emf?
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Question #d0a1c
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How does the Bohr atomic model differ from Rutherford's?
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What is the difference between an electric motor and an electric generator?
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Person A travels up in an elevator at uniform acceleration. During the ride, he drops a ball while Person B shoots an arrow upwards directly at the ball. How much time will pass after Person B shot the arrow before the arrow hits the ball?
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Question #9a1d2
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If there is a sphere made up of one hemisphere of Copper and another of iron, On heating what would be its effect and where would its centre of gravity be?
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An apple falls from a tree and hits the ground 9.35 m below. With what speed will it hit the ground?
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How can momentum be increased?
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What is moment of force?
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Question #baf29
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Can velocity be zero if accelerating?
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A rock weighs 2.25 Newtons when suspended in air. In water, it appears to weigh only 1.8 Newtons. Why?