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An electron in Li2+ falls from n = 2 to the ground state. Calculate the wave number, (v), of the emitted photon.
a construction crew wants to extend a uniform rigid metal bar of length 7m and mass 400kg between two platforms which lie on the same horizonantally level. What force does the beam exert on the edge of the platform
Create horizontal component of the pendulum
Captain Kirk and crew land on a planet that is made ofintergalactic bird feathers. What is the apparent weight of someone at the equator
A uniform 1.4-kg rod that is 0.75 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
A long uniform rope with a mass of 0.113 kg per meter lies on theground. Calculate the upward force you must exert at the moment
Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts at one end with a force of 100 N, and the other lifts the opposite end with a force of 900 N.
A dolphin in an aquatic performance jumps straight up out of the water at a velocity of 11 m/s. How high does his body rise above the water in meters
The earth has a vertical electric field with a magnitude of approximately 100 V/m near its surface. What is the magnitudeof the potential difference between a point on the ground and pointon the same level as the top of the Washington Monument (555 f..
A force vector has a magnitude of 595 newtons and points at an angle 39o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
A football is kicked straight up into the air; it hits the ground 3.4 later. With what speed did it leave the kicker's foot
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.38 T. Determine the area of the first surface
a flat surface having an area of 3.6 m2 is rotated in a uniform electric field of magnitude e 6.3 x 105 nc. determine
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