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A 9150kg railroad car travels alone on a level frictionless track with a constant speed of 13.0m/s . A 4100kg load, initially at rest, is dropped onto the car.
students want to construct a scattering experiment using a power source of 5.5 mev alpha-particles to scatter from a
A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.30M. After a time of 3.90s the voltmeter reads 3.2V. What is the capacitance? What is the time constant of the circuit?
The "hang time" of a punt is measured to be 4.50 s. If the ball was kicked at an angle of 63 degrees above the horizontal and was caught at the same level from which it was kicked, what was its initial speed?
A long slender bar is made from an unknown material. The length of the bar is 0.752 m, its cross-sectional area is 1.48 × 10-4 m2, Find the Young's modulus of the unknown material
A capacitor is connected across an ac source that has voltage amplitude 61.0 A and frequency 81.5 Hz. What is the phase angle ? for the source voltage relative to the current? Does the source voltage lag or lead the current?
Two of Angie's friends are talking to each other at a distance of 3.0 m from where Angie stands. What sound intensity does he measure for the two talkers
a 9.40-l container holds a mixture of two gases at 33 degc. the partial pressures of gas a and gas b respectively are
A current of 48.6 mA exists in a wire for 1.20 minutes. What is the rate that charge passes a point in the wire
A box starts out at the top of a frictionless ramp, then slides down. The ramp has a heighth=3meters and a slope of5degrees with respect to the ground. What is the total mechanical energy of the box at the top of the ramp
A runner approaching the start/finish line hears the bell signaling one lap to go. The bell emits a 352 Hz tone, How fast is she going
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
A stone is thrown with an initial speed of 15 m/s at an angle of 53degrees above the horizontal from the top of a 35m building. what is the speed of the rock as it hits the ground
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