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Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 152 bullets, each of mass 8.0 g, at 440 m/s. The bullets strike his mighty chest, which has an area of 0.74 m2. Find the average force exerted on Superman's chest if the bullets bounce back after an elastic, head-on collision.
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What is the greatest weight W that can be supported this way without pulling out the nail? What is the magnitude of the force that the hinge exerts on the pole.
A horizontal aluminum rod 4.8 cm in diameter projects 5.6 cm from a wall. A 1200 kg object is suspended from the end of the rod, Find the shear stress on the rod
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, your 1200 square ft house might lose heat through the walls at a rate of 4000 W.
A 35.1 kg girl and a 58.4 kg boy are on the surface of a frozen lake, 14.5 m apart. Calculate the magnitude of the girl's acceleration
A person is running at 7 m/s with her hands outstreched abover her head (1.95m from feet to finger tips) she runs exactly horizontally off the edge of a chasm and attempts to grab onto opposite side.
A 0.20 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. Determine the speed of the stone
A bar magnet is oriented with its magnetic dipole moment at 57.3° to the direction of a 0.0357-T magnetic field, Find the magnitude of the magnet\'s magnetic dipole moment
What is the electric field vec E. What is force vec F on a -1.0 nC charge placed at the midpoint.
A flywheel in a motor is spinning at 560 when a power failure suddenly occurs. The flywheel has mass 40.0 and diameter 75.0. The power is off for 34.0, and during this time the flywheel slows down uniformly due to friction in its axle bearings. Durin..
Conclude the magnitude and directional angle
Jane looking for tarzan, is running at top speed (5.7m/s) and grabs a vine hanginf vertically from a tall tree in the jungle. How high can she swing upward
A 500 \mu F capacitor is connected across a 1.25 H inductor. At a certain time, the charge on the capacitor is zero and the current is 0.347 A. What is the peak charge on the capacitor
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