Physics

a solenoid has 21 turns per centimeter of its length. the solenoid is twisted into a circle so that it becomes shaped like a toroid. what is the magnetic field at the center of each turn of the toroid? the current is 15
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what is not an economical operation of a vehicle? applying the brakes smoothly starting the car quickly obeying the speed limit checking for maintenance regularly
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what normal force does a horizontal table exert on a 3.5 kg book that sits at rest? be sure to draw a diagram.
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a physics student wants to construct a model of an electric motor. The student creates a chart for the steps in the process. the chart shows what the student recorded so far:what is the correct ordering of these cards to model how an electric motor works?
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2. The cylinder moves at this velocity all the way around the circular path. Yet when we view the side to side motion, the cylinder does not appear to move with a constant velocity. At which location during the side-to-side motion does the cylinder appear to have the minimum side-to-side velocity?3. At which location during the side-to-side motion does the cylinder appear to have the maximum side-to-side speed
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which choice accurately describes what light is?responsesneither a particle nor a waveneither a particle nor a waveboth a particle and a waveboth a particle and a wave,only a particleonly a particleonly a waveonly a wave
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if a wavelength is 635 nm, what is the frequency? please show all the steps and all of your work when you upload your final answer.
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suppose one speaker is driven at 569 hz and the other at 559 hz. what is the beat frequency in hz? the average frequency in hz? please write your answers with integers.
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how hard must each player pull to drag the coach at a steady 2.0 m/s ? express your answer with the appropriate units.
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you compress a piston full of gas and do 8.4 joules of work on it. if the internal energy (u) of the system increases by 3.3 joules, how much heat (in joules) left the system (give your answer as a positive number)?
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bohr developed an equation for calculating the energy levels of a hydrogen atom. which of the following can be determined using this equation? select all that apply.
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what experimental evidence do you have showing that momentum is conserved in inelastic and elastic collisions?
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select all that apply select all the stars that would have the same luminosity. (use the stefan-boltzmann law.) presented are the radii and temperatures of five stars compared to the sun.
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an electric train operates on 625 v. what is its power consumption when the current flowing through the train's motor is 2,110 a?
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a rod of length 55 cm and mass 1.6 kg is suspended by two strings which are 38 cm long, one at each end of the rod. part one the string on side b is cut. find the magnitude of the initial acceleration of end b. a hint about the aor a hint about tension
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A droplet of ink in an industrial ink-jet printer carries a charge of 2.110?10C and is deflected onto paper by a force of 3.210?4N. Find the strength of the electric field (E=F/q) required to produce this force. Express your answer to two significant figures and include the appropriate units.
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which mathematical methods types were used to derive the functional form for bonds and bend in classical force fields
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if the speed decreases to 46 km/h in 5 s , determine the coefficient of kinetic friction between the tires and the road.
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Which traits are controlled by polygenic inheritance? Select four options. red hair hazel eyes blood type length of corn ears birth weight fur color of palomino horses
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Two objects with equal masses are in motion. Which object will have more kinetic energy? a. the object with the greater volumeb. the object with the greater velocityc. the object with the greater densityd. the object with the greater acceleration
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Which of the following is an example of the law of acceleration?A - Sitting in your chair and breaking it.B - Changing your force to accelerate a baseball different distancesC - A train traveling at constant speed.D - Throwing a ball in space and it goes on FOREVER.
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A boy on a 1.9 kg skateboard initially at resttosses a(n) 8.0 kg jug of water in the forwarddirection.If the jug has a speed of 2.7 m/s relative tothe ground and the boy and skateboard movein the opposite direction at 0.65 m/s, find theboys mass.Answer in units of kg.
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if transits are so rare, why do astronomers think they are the best way to search for extrasolar earths?
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A rock with a mass of 10.0 kg is balanced on top of a large boulder. Describe the forces acting on the rock, and use the concept of forces to explain why it stays on top of the boulder.
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