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A man swings froma rope on the top of a building that is30 meters high. He is standing at 10 meters high. what is his velocity at the bottom of his swing?
Calculate the magnitude, the direction of resultant force and the coefficient of kinetic friction.
A wire carries a current of 0.665 A. This wire makes an angle of 55.5° with respect to a magnetic field of magnitude 4.92E-5 T, What is the length of the wire
A ball rolls down a roof that makes an angle of 30 degrees to the horizontal. The ball has an initial speed of 5 m/s and the roof is 7 meters tall. how far from the base of the house does it land
at its hot reservoir at 135 degrees Celsius and has a thermal efficiency of 22.0%. How much heat does the engine waste per cycle
Assume that the earth has an average surface temperature of29°C and is a perfect emitter of radiation (e = 1). Find the energy per second per square meter
Force F = (-5.0 N) i hat + (5.0 N) j hat acts on a particle with position vector r = (-3.0 m) j hat + (5.0 m) k hat. What is the angle between the directions of force and torque
A wrench is thrown at a speed of 69 mph at a wall that is 70 ft away. How much force does the wall exert on the wrench and in what direction
The allowed energies of a simple atom are 0.0 eV, 5.0 eV and 8.0 eV. An electron traveling at a speed of 1.8×10^6 m/s collisionally excites the atom. What is the minimum speed the electron could have after the collision? What is the minimum speed t..
An electron is accelerated by a constant electric field of magnitude 280 N/C. Find the acceleration of the electron
A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a hot reservoir at 600 K and rejects energy by heat transfer to a cold reservoir at temperature Tc. Determine the energy rejected in KJ
Assume the bat is a wooden rod of uniform diameter and take the pivot point to be in the middle of the bat, at the end of the bat, Calculate the moment of inertia of a baseball bat
Consider an RC circuit in which the capacitor is beingcharged by a battery connected in the circuit. After a time equalto three time constants, what percentage of the final charge is present on the capacitor?
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