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A 150 g ball on a 60-{\rm cm}-long string is swung in a vertical circle about a point 200 {\rm cm} above the floor. The tension in the string when the ball is at the very bottom of the circle is 4.0 N. At the very bottom of the circle, a very sharp knife is suddenly inserted, as shown in the figure , to cut the string directly below the point of support. How far to the right of where the string was cut does the ball hit the floor?
The puck has a mass of 0.140kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 70cm/s. The string is pulled downward 15cm by the hole in the frictionless table. Determine the work completed on the puck.
A 1.0mm -diameter, 40cm -long copper wire carries a 3.5A current, What is the potential difference between the ends of the wire
At 45 degrees Celsius,the resistance of a segment of gold wire is 85Ω . Whenthe wire is placed in liquid bath, the resistance decreases to80Ω . What is the temperature of the bath?
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.90 cm apart. Determine the acceleration of the electron
One mole of a dilute gas initially has a pressure equal to 1.00 atm, and a volume equal to 23.0 L and an internal energy of 3.49 kJ. Find the heat absorbed by the gas
How did Marie and PierreCurie measure the radio activity of her pitchblende samples? How did she deduce that there must be unknown elements in the pitchblende – the ones she later found (Po and Ra)?
A liquid is used to make a mercury-type barometer, as described in section Pressure in a Fluid. The barometer is intended for spacefaring astronauts. Find the atmospheric pressure at the surface of Planet X
An engine operates between temperatures of 280 K and 700 K at 62.0 % of its maximum efficiency. how much work does the engine do
A box at rest has the shape of a cube 3.5m on a side. This box is loaded onto the flat floor of a spaceship, What is the volume of the box as we observe it
FM radio stations use radio waves with frequencies from 88.0 to 108 MHz to broadcast their signals. Assuming that the inductance in the figure has a value of 7.50 10-7 H, determine the range of capacitance values that are needed so the antenna can..
An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00-T field with his fingers pointing in the direction of the field.If the resistance of the ring is 1.00 m?, how much heat will be transferre..
The 2.4m Hubble space telescope has been placed into Earth orbit by the same space shuttle. What angular resolution could this telescope achieve by Rayleigh's criterion
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