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A brick is thrown at a speed of 72 mph at a wall that is 15 ft away. Upon colliding with the wall the brick exerts 83 lb of force due south on the wall. How much force does the wall exert on the brick and in what direction?
A person wearing a seat belt can withstand an acceleration of -310m/s squared. How thick should barriers be to carefully stop a car that hits a barrier at 120km/h.
The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and examine the average pressure of the expanding gas.
You measure an electric field of 1.26×106 N/C at a distance of 0.149 m. from a point charge. find the magnitude of the charge
What is the oscillator's total mechanical energy as it passes through a position that is 0.749 of the amplitude away from the equilibrium position
A river ?ows at a speed vr = 5.85 km/hr with respect to the shoreline. A boat needs to go perpendicular to the shoreline to reach a pier on the river's other side, determine the width of the river
The centripetal acceleration in a horizontal centrifuge is 75 g's when it is rotating at 2000 rpm, What is the radius of the centrifuge
A microwave oven operates at 2.4 GHz with an intensity inside the oven of 2650W/m2. What is the amplitude of the oscillating electric field
A 16-QAM modulator with 2 voltage levels uses maps the symbols on equal phases on both voltage levels. Draw the signal space (constellation) for your assumed phase angles.
Two 4.9 cm× 4.9 cm metal plates are separated by a 0.19-mm-thick piece of Teflon. What is the maximum potential difference between the disks
A Toyota Prius driving north at 61 and a VW Passat driving south at 42 are on the same road heading toward each other.
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. How long does the cork remain in the air
On a cold day, 28100 J of heat leaks out of a house. The inside temperature is 19.0° C, What is the increase in the entropy of the universe that this heat loss produces
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