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A photon is emitted when a hydrogen atom undergoes a transition from the n = 9 state to the n = 4 state.
(a) Calculate the energy of the emitted photon.
_____eV
(b) Calculate the wavelength of the emitted photon.
_____µm
(c) Calculate the frequency of the emitted photon.
_____Hz
The two cylinders both have a radius of 1mm. Material 1 has a conductivity of 1.2 x10^4 S/m and material 2 has a conductivity of 1.4 x 10^4 S/m. Piece 1 is 6cm long and piece 2 is 8cm long.
A proton moves at a speed of 995 m/s in a direction perpendicular to a magnetic field with a magnitude of 0.76 T
A u-tube with constant cross section is partly filled with water. Engine oil of density 0.8g/cm3 is poured into the right arm (without mixing) until the water level rises 2.0cm. The length of the oil column is then.
What is the ratio of the amplitude of the damped oscillation
Imagine a perfectly elastic collision between to masses. Mass m1 is moving horizontally to the right at v0 towards mass m2. Calculate the recoil angle of m2 and the recoil speed of m2
q1. light from a he-ne laser lambda 632.8 nm strikes a pair of slits at normal incidence forming a double-slit
A moon orbits a planet of unknown mass with a period of 1.8 days. If the radius of the moon's orbit is 420,000,000 meters, Determine the centripetal acceleration of the moon
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. The bullets leave this barrel with a muzzle velocity of 334 .What is the acceleration of the bullet while it is in the barrel, assuming it to be constant?
q1. compute earths gravitational force on the shuttle astronauts while orbiting at an altitude of 220 miles or 354 km
a small motor draws a current of 1.75 A from a 120.0 V line. It costs $35.81 to operate the motor for 4.00 hrs at $0.0600 /kWh. What is the power output of the motor
To appreciate the strength of gravity, calculate the number of steel cables that would be required in the absence of gravity to hold the moon in orbit about the earth.
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the magnitude of the current in the bar
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