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An electron is trapped in a 1-dimensional box that is 401 nm wide. Initially, it is in the n = 4 energy level, but after a photon is absorbed the electron is in the n = 7 energy level. What was the wavelength of the absorbed photon?
Eventually, the electron ends up in the ground state. As it does so, one or more photons are emitted during those transitions. Find the wavelengths of the least energetic and most energetic photons that might be emitted during the all the possible transitions to the ground state.
Determine the flux of particles escaping from the exobase of Earth's atmosphere using a number density at the exobase of 10^5 particles/cm^3 and a temperature of 700K.
A swing is made from a rope that will tolerate a maximum tension of 6.0 x 102 N without breaking. Find the mass of the heaviest person who can ride the swing
A 1.5V battery delivers 9.0ma for 40 hours. During that time, the battery voltage drops linearly from 1.5V to 1.0 V. How much energy does the battery deliver during this time
7.85 g of nitrogen gas at an initial pressure of 3.87 atm and at 16°C undergo an isobaric expansion until the volume has doubled. What is the gas volume after the expansion
a clean room is kept at a positive gauge pressure of 0.025 kpa with respect to the outside to minimize contamination
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop.
A flea is able to jump straight up about 0.55 m. It has been said that if a flea were as big as a human, How high would this "super flea" be able to jump
Find graphically magnitude and direction of resultant force
A projectile is launched from ground level to the top of a cliff which is 195m away and 155 m high, find the initial velocity of the projectile
A 18 kg dog is standing on the edge of a stationary, frictionless turn table of rotational inertia95 kg·m2 and radius 2.19 m. The dog walks once around the turntable. What fraction of a full circle does the dog's motion make with respect to the gro..
Most of us know intuitively that ina head-on collision between a large dump truck and a subcompactcar, you are better off being in the truck than in the car. What average force does the seatbelt exert on the car driver
in a heart pacemaker a pulse is delivered to the heart 81 times per minute. the capacitor that controls this pulsing
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