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Take element Z = 21 from the periodic table. Ionize it 20 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?
What is the energy of the electron when it is in the n = 20 principal state in the ion above?
a physics professor demonstrates the doppler effect by tying a 600hz sound generator to a 1.0-m-long rop, what are the highest and lowest frequencies heard by a student in the classs room
A rock of mass m = 2 kg is tied to a string of length L = 1.9 m and is twirled in a vertical circle. The speed v of the rock is constant; that is, it is the same at the top and the bottom of circle.
A 1.5kg ball and a 3.0kg ball are connected by a 3.0m long rigid, massless rod. What torque will bring the balls to a halt
The person in the middle weighs 190 N, and the tensions in each rope are 200-N. What is the weight of the staging.
Consider an LR circuit with a variable inductor and with deltaVs=150 V, f=60Hz, R=5 ohms. Calculate the power in the resistor
Suppose the moon were held in its orbit not by gravity but by the tension in a massless cable. What is the speed of the moon in its orbit about the earth
Once the station is completed, it is set rotating at a rate that requires an object at the rim to have radial acceleration, thereby simulating Earth's surface gravity. This is accomplished using two small rockets, each with 130 thrust that are mounte..
A crankshaft with a diameter of 3.0 cm , rotating at 2500 rpm comes to a halt in 1.50 s, What is the tangential acceleration of a point on the surface of the crankshaft
The mass of mars is 6.419 times 10 26 square kg and the mass of a single proton is 1.673 times 10 negative 27 square kg. assuming mars is made entirely of protons, how various protons would make up mars.
a wire lying in the plane of the page carries a current directed toward the bottom of the page. What path will the electron follow
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
submarine on the ocean surface receives a sonar echo indicating an underwater object. The echo comes back at an angle of 20 degree above the horizontal and the echo took 3.04s to get back to the submarine What is the object's depth?
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