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A 569-?F capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 88.5 V to 13.3 V in 4.57 s. Find the resistance of the resistor in kilohms.
After a tornado, a 0.55g straw was found embedded 2.6cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was the speed of the straw when it hit the tree.
A sledge loaded with bricks has a total mass of 17.2 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. What is the mechanical energy lost due to friction
A typical ten-pound car wheel has a moment of inertia of about. The wheel rotates about the axle at a constant angular speed making 60 full revolutions in a time interval of 5.
Assume that, as lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears. You after that stand, elevating your eyes by a height H = 1.90 m.
An x-ray tube is operated at 40600 V. find the minimum wavelength of the radiation emitted by this tube
A 4.9 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.6 ? 10-12 N. What is the gravitational potential energy of the two-particle system
A skier is gliding along at 2.8m/s on horizontal, frictionless snow. He suddenly starts down a 10?incline. what is the distance of the incline
A 5.30 ball is dropped from a height of 11.5 above one end of a uniform bar that pivots at its center. The bar has mass 8.00 and is 6.20 in length. How high will the other ball go after the collision
If 11.6 g of gold is deposited on the negative electrode of an electrolytic cell in a period of 3.03 hours, then what is the current through the cell during this period
Calculate the force a mother must exert to hold her 12.0 kg child in an elevator accelerates upward at 0.850 m/s2
There is a uniform charge distribution of ?= 7.90 * 10^-8 C/m along a thin wire of length l=5.58 cm. Find the magnitude of the electric field at the center of the semicircle
A gas system has an initial volume of 5.44L with the number of moles unknown. When the volume changes to 3980mL, What was the initial number of moles
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