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1. Why is thermal energy hard to convert into other forms of energy like potential or kinetic energy?
2. What are the charges that actually move to make a current flow in a wire? How do you know that?
3. What measurement in a circuit provides similar information about a charge's potential energy? Why? What would be analogous to a resistor in the skate park simulation?
Since the circumference of a circle of radius r is 2p r, every time the center of mass moves a distance 2p r, the object rotates a full circle (2p radians). If this happens in a time T then. Combine these equations to find out an expression for ..
The front 1.20 meter of a 1300 kilogram van is designed as a "crumple zone" that collapses to absorb the shock of a collision. Find the magnitude of the average force on the van
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 1.40 and a maximum acceleration of 250 . Part A What is the frequency of the wave? Part B What is the amplitude of the wave?
a sinusoidal sound wave is described by the displacement sxt sm coskx - omegat where sm 4.89 mum k 12.4 radm and
At a distance of 60.0km from a radio station antenna the electric-field amplitude is 8.80×10?2 V/m, Assuming that the antenna radiates equally in all directions (which is probably not the case), what is the total power output of the station
A 100 arrow is shot vertically from a bow whose efficient spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does the arrow rise .
A ship is lost in a dense fog in a Norwegian fjord that is 2.56 km wide. The air temperature is 5.00°C. How far from one side of the fjord is the ship
Two different simple harmonic oscillators have the same natural frequency (f=2.60 Hz) when they are on the surface of the Earth. Calculate the new frequency of the vertical spring and mass
A machine shop has 120 equally noisy machines that together produce an intensity level of 92 dB. If the intensity level must be reduced to 82 dB, how many machines must be turned off?
A skateboarder shoots off a ramp by a velocity of 6.5 m/s, directed at an angle of 54° above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as t..
the volume of a gas is decreased by a constant external pressure of 0.200atm, changing from 2.10 litters to 0.58 litters. during this compression
Boxes are transported from one location to another in the ware-house by means of a conveyor belt that moves with a constant speed of 0.50m/s. At a certain location the conveyor belt moves for 2.00 m up an incline that makes an angle of 10° with the h..
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