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Solve the following problem:
Problem: What is the energy of an incident photon that is just enough to excite a hydrogen atom from its ground state to its n = 4 state?
I known the correct answer but I need to know how to get that. Thanks!
A metal rod with a length of 22.0cm lies in the xy-plane and makes an angle of 37.9 degrees with the positive x-axis, What is the magnitude of the emf induced in the rod
a basket ball player is 10.0 m from the basket. the height of the basket is 3.05 m. if he shoots the ball at an angle
the magnetic field perpendicular to a circular coil of 5 turns and diameter 20cm changes from +1.85 T to -.25 T in 30 ms. Find the change in magnetic flux and induced emf
Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at radius R1=2.5cm, Determine the total length of the spiraling path
A 1-kg steel ball and a 2-m cord of negligible mass make up asimple pendulum that can pivot without friction about a pointabove the system. What is the velocity of the block just after impact
a circular gate of 0.6m radius is hinged so it rotates about the horizontal diameter i.e. it rotates about a horizontal
The 1100-kg mass of a car includes four tires, each of mass(including wheels) 35kg and diameter 0.80m. Assume each tire andwheel combination acts as a solid cylinder.
A plane flies 338 km at an angle of 22.3 degrees north of east. find the displacement the plane must now take to reach the airport
A 100-? resistor, an inductor and a 3.0-µF capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz. What is the inductance of the inductor
The coefficient of kinetic friction between a 20 Kg box and the floor is 0.40. How much work does a pulling force do on the box in pulling it 8.0 m at the constant speed? The pulling force is directed 390 above the horizontal.
a golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it moves and rotates with a frequency of 3081
in her job as a dental hygienist kathryn uses a concave mirror to see the back of her patients teeth. when the mirror
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