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A projectile is fired in such a way that its horizontal range is equal to 12 times its maximum height. What is the angle of projection?
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
A 1.0 µF capacitor is connected in parallel with a 2.4 µF capacitor, What is the equivalent capacitance of this combination
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. It then performs oscillations in the form of simple harmonic motions. Determine the magnitude of the o..
A train 389 m long is moving on a straight track with a speed of 40.6 m/s. The engineer applies the brakes at a crossing, find how long (in s) the train blocked the crossing
An electric motor can accelerate a 4-kg grinding wheel in a form of a solid disk of radius 0.2 m from rest to 75 rad/s in 15 s. Find the torque generated by the motor
How does the magnitude of electrical force between a pair of charged objects change while the objects are moved twice as far apart? Three times as far apart.
A car's starter motor draws 55 A from the car's battery when starting up. If the start-up time is 2.4 s, how many electrons pass a location in the circuit during that time
A 250-g object attched to a spring oscillates on a frictionless table with a frequency of 4 Hz and an amplitude of 20 cm. Calculate the maximum potential energy of the system
An AC voltage with an amplitude of 116 V is applied to a series combination of a 151 ?F capacitor, a 129 mH inductor, and a 23.4 ? resistor. Calculate the power factor at this frequency
A loudspeaker on a homecoming float - mounted on a pole -- is stuck playing at an annoying 210 Hz tone, What is the intensity of the signal at this point, What is the power of the speaker
A 14.5 gram, 78.6 centimeter long steel guitar string is vibrating in its fourth harmonic. What is the tension on the steel guitar 'string'
A 6.0 kg block of aluminum is heated from 20°C to 90°C at atmospheric pressure. Find the work done by the aluminum
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