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A train travels due south at 60 m/s. It reverses its direction and travels due north at 60 m/s. What is the change in velocity of the train?
questionelectric charge on the earths surface and in the earths atmosphere produces an electric field that on a clear
A solid insulating sphere of radius a = 5 cm is fixed at the origin of a co-ordinate system as shown. The sphere is uniformly charged with a charge density ? = -312 ?C/m3. find the electric potential at the outer surface of the insulating sphere
A quantity of ideal gas requires 800 kJ to raise the temperature of the gas by 10.0 K when the gas is maintained at constant volume. find the adiabatic gas constant of this gas
What angular velocity would be required to give a rotating object of mass 25 kg and a radius of 2 m a centripetal force of 50 N
Object O1 is 16.3 cm to the left of a converging lens with a 11.7-cm focal length. What is the overall magnification of this system
An object is placed L = 7.20 cm to the left of a converging lens of focal length 3.00 cm. What is the magnification due to the mirror
One fine spring afternoon, you go outside to play a rousing game of hoop-and-stick. If your hoop rolls without slipping, what is the angular speed of the hoop
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 304 K, What is the coefficient of performance of this refrigerator
What is the largest index of refraction that the liquid can have, such that none of the light is transmitted into the liquid and all of it is reflected back into the solid
The flux through a loop is given by ?m = (0.20t 2 - 0.58t) , where ?m is in webers and t is in seconds. Find the induced emf as a function of time
The engineer takes 0.400 seconds to react, and then applies the brakes. At what rate must the passenger train then decelerate in order to avoid a collision?
In a friction experiment, your wooden plank is horizontal. When a mass of 100 grams is hanging on the weight hanger of mass 50 grams, what is the coefficient of kinetic friction
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