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Question1
A 30-kg girl is bouncing on a trampoline. Throughout a certain interval after leaving surface of the trampoline, her kinetic energy decreases to 220 J from 410 J. How high does she rise during this interval? Neglect air resistance.
Question2
One billiard ball is shot east at 1.8. A second, identical billiard ball is shot west at 1.2. The balls have a glancing collision, not a head-on collision, deflecting second ball by 90 and sending it north at 1.39 .What are speed and direction of the first ball after the collision? What is direction of the first ball after the collision? Provide the direction as an angle south of east.
A mass M is suspended using two cables which make angles of theta_1 and theta_2 with the horizontal across the top. What is the tension (T_1) in the left-handed cable
You've signed up for a trip to Mars. After being cooped up in the tight space capsule for months, you are very excited to finally arrive and take a standing leap straight upward. How high will you jump
Find out the magnetic force on the rod
A student sitting on a frictionless rotating stool has rotational inertia 0.92kg?m2 about a vertical axis through her center of mass, Ignoring her arm mass, what's her new rotational velocity
a hot iron horseshoe(mass=0.50kg), which has just been forged,is dropped into 2.7 L of water in a o.45 kg iron pot initially at 22 degree celcius.If the final equilibrium temparature is 27 degree celcius, estimate the initial temparature of the hot..
A charged capacitor is connected to an inductor. At time t = 0 the charge on the capacitor is Q = 6 %u03BCC. find the amplitude of the current at that same instant
When operated on a household 110-V line, typical hair dryers draw about 1650 W of power. What is the resistance of the dryer
A 25 kg cannon shell is subjected to a constant acceleration of 1200 g while in the cannon barrel. What force is the burning propellant exerting on the shell?
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
suppose the speci?c heats of milk and coffee are the same as that of water.
If the magnetic field in a traveling EM wave has a peak magnitude of 13.3nT, what is the peak magnitude of the electric field
A rotating cylinder about 16 {rm km} long and 7.40 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the same acceleration due to gravity as on Earth.
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