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A pendulum consists of a small object of mass 2.9 kilogram hanging at the end of a 2.0 meter long light string that is connected to a pivot point.
(a) Evaluate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes an 8 degree angle with the vertical. N•m
(b) Does the torque increase or decrease as the angle increase?
increase
decrease
A runner is practicing on a circular track that is 675 m in circumference. If he runs halfway around the track and stops at the farthest eastern point of the track, what is the distance he traveled
In some places, insect "zappers," by their blue lights, are a familiar sight on a summer's night. These devices utilize a high voltage to electrocute insects. One such device uses an ac voltage of 4200 V, which is obtained from a standard 120-V outle..
A stationary block of mass M - m is struck by a bullet of mass m traveling at speed v0. During the impact, obtain the speed of the block
A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.94 m, 5.13 m) while a constant force acts on it. How much work is done by the force on the coin during the displacement
A space heater, operating from a 120V line, has a hot resistance of 14Ω. At what rate electrical energy transfered into heat
A series AC circuit contains a resistor, an inductor of 220 mH, a capacitor of 6.00 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the capacitive reactance
Sound propagating during air at 30 degrees Celsius passes through a vertical cold front into air that is 4.0 degrees Celsius. if the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
Starting from rest a motorist accelerate at 2.00 m/s for 8.00 second. then goes at constant velocity for 30.0 second. Calculate the total distance covered in the sequence
A series RLC circuit consists of a 96.0 ? resistor, a 7.00 mHinductor, and a 1.40 nF capacitor. What is the power supplied to the circuit if ? =1/2?0
A 5.2 meter wire with mass of 87 gram is attached to the mast of a sail boat. Evaluate the tension for a 97 gram wire
the diameters of the main rotor and tail rotor of a single-engine helicopter are 7.68 m and 1.02 m respectively. the
a helium-neon laser beam has a wavelength in air of 633 nm . it takes 1.38 ns for the light to travel through 30 cm of
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