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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 1200 car is moving on the freeway at 60.0 . What is the magnitude of its momentum in SI units? What is the magnitude of its kinetic energy in SI units. how much kinetic energy does it have
A small glass bead has been charged to 60.0 . A metal ball bearing 2.70 above the bead feels a 1.50×10?2 downward electric force. What is the charge on the ball bearing
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
two point charges 2.0 uc micro coulombs and -4.0 uc micro coulombs lie 0.45 m apart on the x-axis. are there any points
An object moves with constant acceleration 4.00 m/s^2 and over a time interval reaches a final velocity of 12.0 m/s. If its initial velocity is 6.00 m/s, what is its displacement during the time interval?
A sphere of radius 0.500 m, temperature 25.5°C, and emissivity 0.873 is isolated in an environment of temperature 77.0°C. What is the sphere's net rate of energy exchange
A cylinder 0.150 meter in diameter rotates in a lathe at 620rpm. Find the tangential speed of the surface of the cylinder
Radioactive strontium tends to concentrate in the bones of people who ingest it. find which is predominantly calcium in composition
a pendulum sweeps out an angle of 12.5 during its motion. how far does the pendulum bob the ball at the end of the rope
Jill has just gotten out of her car in the grocery store parking lot. The parking lot is on a hill and is tilted 3 degrees. How far has the cart rolled before Jill catches it
A 1.00 liter bubble of air at the bottom of the Marianas Trench has an inital temperature of about 0C. what is the volume of the bubble as it breaks the surface
A black mamba snake has a length of 4.3 m and a top speed of 8.9 m/s. How far does the snake travel in that time
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