How fast is the cannonball going
A cannonball shot with an initial velocity of 142 m/s at an angle of 45° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is the cannonball going when it hits the balloon?
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A Carnot engine performs work at the rate of 432 kW while using 637 kcal of heat per second. If the temperature of the heat source is 556°C, at what temperature (in Celsius) is the waste heat exhausted?
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What was the Northridge Earthquake Seismic Wave?
A small but measurable current of 1.2X10^-10 A exists in a copper wire whose diameter is 2.5mm. The number of charge carriers per unit volume is 8.49X10^28 m^-3. Assuming the current is uniform, calculate the (a) current density and (b) electron d
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