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Two guitar notes that are slightly out of tune are sounded at the same time. One has a frequency of 255.2 Hz, the other has a frequency of 257.9 Hz. Calculate the beat frequency.
A middle-aged man starts to wear eyeglasses with lenses of2.0 D that allow him to read a book held as close as 25 cm.Several years later, he finds that he must hold a book no closerthan 35 cm to read it clearly with the same glasses, so hegets new..
while walking between gates at an airport you notice a child running along a moving walkway. estimating that the child
2 isolated charges +q and -2q are 2 cm apart. if F is the magnitude of the force acting on charge -2q. What are the magnitude and direction of the force acting on charge +q
What least horsepower must a motor have to be able to drag a 320 box along a level floor at a speed of 1.10 if the coefficient of friction is 0.50.
A pump is used to empty a 6000{\rm L} wading pool. The water exits the 2.5-cm-diameter hose at a speed of 2.0{\rm m}/{\rm s}
Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 18.0cm and carries a clockwise current of 14.0 A, as viewed from above, and the outer wire has a diameter of 38.0cm .
a person looking out the window of a stationary train notices that raindrops are falling veritcally down at a speed of
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. How many electrons are there in 4.95 liters of water
A 62- kg gymnast stretches a vertical spring by 0.52 m when she hangs from it. How much energy is stored in the spring
a charge is spread uniformly along the y-axis from y 0 to y 1. the charge density on the y-axis is . find the
when a ball rolls down a incline plane it gains speedbecause of gravitywhen rolling up it losees speed because of
A 7.80 gram bullet moving at 540 m/s penetrates a tree trunk to a depth of 6.4 centimeter. Use work and energy considerations to calculate the average frictional force that stops the bullet
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