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A +60 µC charge is placed 56 cm from an identical +60 µC charge. How much work would be required to move a +0.57 µC test charge from a point midway among them to a point 11.0 cm closer to either of the charges?
the temperature of the air in a resonator is 15degc when a tuning fork vibrates at one end the spacing between tow
a rock is thrown vertically upward with a speed of 11.0 from the roof of a building that is 70.0above the ground.
A thin rod consists of two parts joined together. One-third of it is silver and two-thirds is gold. The temperature decreases by 31.3 C°. Determine the fractional decrease ?L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the init..
A mixture of ethyl alcohol (molecular mass = 46.1 u) and water (molecular mass = 18.0 u) contains one mole of molecules. What mass m of water does it contain
q1. a child is sliding on a sled at 1.6 rm ms to the right. you stop the sled by pushing on it for 0.80 rm s in a
The cable of a hoist has a cross-section of 80 mm2. The hoist is used to lift a crate weighing 500 kg. How much will it extend if it is made of steel
A roller coaster seat exerts a normal force of 120N on a 40kg passenger at the apex of a vertical loop. what is the speed of the coaster
two circular disks spaced 0.50mm apart form a parallel-plate capacitor. transferring 1.80x109 electrons from one disk
A square metal sheet 3.3 cm on a side and of negligible thickness is attached to a balance and inserted into a container of fluid. What is the surface tension of the fluid
a ship's horn can be heard above typical background noise if at intensity level 20 dB. what must be the power of the horn's output to achive this level at 5.0 km away
Tritium has a half-life of 12.3 y and can also be used to date organic matter. If the activity of tritium is determined to be 3% of the expected activity, what is the age of the sample
A sound wave from a police siren has an intensity of 103.1 W/m2 at a certain point; find the intensity level of the sound wave due to the ambulance?
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