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A restaurant manager has decorated his retro diner by hanging (scratched) vinyl LP records from thin wires. The records have a mass of 179 g, a diameter of 12 in., and negligible thickness. The records oscillate as torsion pendulums.
(a) Records hung from a small hole near their rims have a period of roughly 3.8 s (figure A). What is the torsion spring constant of the wire?
(b) If a record is hung from its center hole using a wire of the same torsion spring constant (figure B), what is its period of oscillation?
A tennis ball initially moves with a velocity of 26.0 m/s horizontally to the right. A tennis racketstrikes the ball, giving it a velocity of 26.0 m/s to the left.
What is Lagrangian for the system
A bus is traveling at a speed of 25.0m/s along a level road. Find the shortest distance in which the bus can come to a halt without causing the crate to slip forward relative to the bus
If 4.0 L of antifreeze solution(specific gravity = 0.80) is added to 3.5 L of water to make a 7.5 L mixture, what is the specific gravity of the mixture
Seismographs measure the arrival times of earthquakes with a precision of 0.100 s.7 To get the distance between to the epicenter of the quake, they compare the arrival times of S- and P-waves, which travel at different speeds.
Suppose you place your face in front of a concave mirror. Which one of the following statements is correct?
An archer's bow is drawn at its midpoint until the tension in the string is 0.835 times the force exerted by the archer. What is the angle between the two halves of the string
a ship uses a sonar system to detect underwater objects. the sonar system emits underwater sound waves and measures the
One way to determine charge is to integrate current (since current is the derivative of time varying charge). How might that be done
question1an airplane with a speed of 79 ms is climbing upward at an angle of 48deg counter clockwise from the positive
A negative charge of -0.550 exerts an upward 0.225 force on an unknown charge 0.285 directly below it. what is unknown charge
5 mol of an ideal gas expands isothermally at 373 K to 1.2 its initial volume. Find the heat flow into the system. The universal gas constant is 8.31 J/K · mol
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