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A small glass bead has been charged to +19 nC. A metal ball bearing 1.0 cm above the bead feels a 0.025 N downward electric force. What is the charge on the ball bearing?
____nC
A source of AC voltage with a frequency of 60 Hz, Find the shortest time in seconds required for the voltage across the light bulb to reach 170 V
An enemy ship is on the east side of a mountainous island. The enemy ship can maneuver to within 2500 meters of the 1800 meter high mountain peak and can shoot projectiles with an initial speed of 250m/sec. If western shoreline is horizontally 30..
A 1.0 kg block is attached to a spring with spring constant 18.0 N/m. While the block is sitting at rest, a student hits it with the hammer and almost instantly gives it a speed of 41.0 cm/s. What is the amplitude of the subsequent oscillations? The ..
An electric motor can accelerate a Ferris wheel of moment of inertia I = 19500 kg·m2 from rest to 9.4 rev/min in 12.0 s, Determine the torque generated by the motor to bring the wheel to 9.4 rev/min
A projectile is fired in such a way that its horizontal range is equal to 14 times its maximum height. What is the angle of projection
Suppose the charge of one is increased by twenty seven times while the charge of the other is reduced to one-third its initial value. What would their separation distance have to be changed to in order to keep the force between them the same?
What quantum number of the hydrogen atom comes closest to giving a 100- nm-diameter electron orbit, What is the electron's speed in this state
Tilted Land is flat, much like Western Utah, but in Tilted Land gravity does not point straight down! Where does the ball hit the ground
a physics professor demonstrates the doppler effect by tying a 600hz sound generator to a 1.0-m-long rop, what are the highest and lowest frequencies heard by a student in the classs room
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. Which rate of rotation gives the greater speed for the ball
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -16.30 eV. What is the energy of the first photon emitted
A 1.50e-14 kg oil drop accelerates downwards at a rate of 1.80 m/s^2 when placed between two horizontal plates that are 9.40 cm apart. Determine the magnitude of the charge on the oil drop
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