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Robert Mugabe is playing in the bath. He notices that wave crests pass his plastic toy duck every 1.2s> he measures the distance among two crests to be 0.06m. How fast are the waves travelling?
Lightning can be studied with a Van de Graaff generator, which consists of a spherical dome on which charge is continuously deposited by a moving belt, What is the maximum charge on the dome
When the temperature of a coin is raised by 83.1 C°, the coin's diameter increases by 2.60 x 10-5 m. If the original diameter is 1.61 x 10-2 m, find the coefficient of linear expansion.
A 30uF capacitor initially charged to 30uC is discharged through a 2.9kohms resistor. How long does it take to reduce the capacitor's charge to 9.0uC
question if barium needs a minimum frequency of 6.07x1014 s-1 to eject electrons calculate the kinetic energy of the
A singly ionized helium atom (He+) has only one electron in orbit about the nucleus. What is the radius of the ion
A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface. Calculate the total energy expended in the acceleration
A simple camera lens with focal object length fO= 3 cm perfectly focuses the the image of an object on a photographic film located a distance 14 cm away from the lens. What is the new magnification
An electric fan is turned off, and its angular velocity decreases uniformly from 400 rev/min to 220 rev/min in 5.00 s. Find the angular acceleration in rev/s^2. Find the number of revolutions made by the motor in the 5.00 s interval. How many more..
The distance between 2 slits (d=0.155 mm) and a screen is 1.54 m. If the spacing between the 2nd order bright fringe and the 3rd order dark fringe is 3.50 mm obtain the wavelength of the light
A golf ball (m=.05 kg) and a cannonball (M=100 kg) collide head on. Before the collision, the two balls had equal speeds of 30 m/s and opposite directions. After the collision, the speed of the golf ball is approximately
A lightbulb has a resistance of 170 ? when operating with a potential difference of 110 V across it. What is the current in the lightbulb
A soccer player runs up behind a 0.450-kg soccer ball traveling at 3.20 m/s, What magnitude impulse did the soccer player deliver to the ball
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