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A 940 gram rock is whirled in a horizontal circle at the end of a 1.2 meter long string (info given)
1. If the breaking strength of the string is 120Newton, find the maximum allowable speed of the rock?
2. At this maximum speed, find what angle does the string make with the horizontal?
question a 1.0-kg copper rod rests on 2 horizontal rails 1.0 m apart and carries a current of 50 a from 1 rail to the
What voltage is required to charge a parallel combination of the two capacitors to the equal total energy.
find the magnitude and direction of the impulse delivered to the ball by the floor.
A block with mass mA = 11.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0kg which hangs vertically
water is moving with a speed of 2.3 ms through a perfectly sealed long pipe with a cross sectional area of 5 cm2. the
How much energy was released in an explosion
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding
After emptying her lungs, a person inhales 4.24 L of air at 0 °C and holds her breath. How much does the volume of the air increase as it warms to her body temperature of 37.1 °C
in a system over thee corner of a table with a frictionless mass less pulley. where block a is on the table with block
The quartz crystal in a digital watch has a frequency of 32.8 kHz. What is its period of oscillation?
What is the coefficient of rolling friction μr for the tire under low pressure?
Three point charges, -6.05 10-9 C, -9.75 10-9 C, and +7.50 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
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