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In the Bohr model of the hydrogen atom, an electron in the lowest energy state moves at a speed of 2.19x106 m/s in a circular path having a radius of 5.29x10-11 m.What is the effective current associated with this orbiting electron?
a truck covers 40.0 m in 9.20 s while smoothly slowing down to a final velocity of 2.60 ms.a find the trucks original
A boat carrying a load of bricks is floating in a canal lock. One of the crew members throws a brick overboard, and it sinks. Does the level of the water in the lock rise or fall
Calculate the resultant velocity of an airplane that normallyflies at 200 km/hr if it encounters a 50 km/hr tailwind. If itencounters a 50 km/hr head wind
a weightlifter works out at the gym each day. part of her routine is to lie on her back and lift a 41kg barbell
A storage tank 30 m high is filled with gasoline. Calculate the force that acts on a square access hatch at the bottom of the tank that measures 0.5m by 0.5m
Each tire of an automobile has an area of 0.026m^2 in contact with the ground. The weight of the automobile is 2.6x10^4 N. What is the pressure in the tires.
The overhead projector used in our lectures form (approximately) 2m-tall images of transparencies that are 30 cm tall. The screen is approximately 3m from the projector.Using these numbers, what must the focal length of the projector lens , in cm?
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
You are standing still, just to the side of a set of train trackers. A train passes by, moving at 25.0 m/s just as it passes by, it blows its whistle, Find the frequency of the sound you hear from the whistle
A 2.0 m conductor is formed into a square and placed in the horizontal xy-plane. What is the magnetic flux through the conductor
A 42.0 kg block of ice slides down a plane with an incline of 34°. Assuming friction is neglecting, what is the acceleration of the block down the incline?
Calculate the self-inductance of a 55.0 cm long, 10.0 cm diameter solenoid having 1000 loops. How fast can it be turned off if the induced emf cannot exceed 3.00 V
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