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Think the Bohr energy expression (Equation 30.13) as it applies to singly ionized helium He+ (Z=2) and an ionized atom with Z=4 and only a single electron orbiting the nucleus. This expression predicts equal electron energies for these two species for certain values of the quantum number n (the quantum number is dissimilar for each species). For quantum numbers less than or equal to 9, what is the highest energy (in electron volts) for which the helium energy level is equal to the ionized atom energy level?
the flight time refers to the total amount of time the ball is in the air from just after it is launched until just
The power rating of a resistor is the maximum power it can safely dissipate without being damaged by overheating. what is the maximum current it can carry without damage
What is the range of wavelengths for FM radio (88 MHz to 108 MHz) and AM radio (535 kHz to 1700 kHz)? (answer: for FM: 2.78m to 3.4m, for AM: 176m to 561m)
Two people are carrying a uniform wooden board that is 3.40m long and weighs 145N. What force does the other person lift
A standard bowling ball weighs 19 pounds. You wish to hold a bowling ball in front of you, by the elbow bent at a right angle. Suppose that your biceps attaches to your forearm at2.5 cm out from the elbow joint, and that your biceps muscle pulls vert..
a box-shaped wood stove has dimensions of 0.75 m x 1.2 m x 0.40 m an emissivity of 0.81 and a surface temperature of
A 210 g, 49 bcm diameter turntable rotates on frictionless bearings at 54 rpm . A 25 g block sits at the center of the turntable. A compressed spring shoots block radically outward along a frictionless groove in the surface of the turntable.
A solid cylinder carries a current that is uniform over its cross section. Where is the magnitude of the magnetic field the greatest ?
An electron enters a region where the electric field is uniform, directed vertically downward, and has a magnitude of 700 N/C. This region of uniform field is 1. 5 cm long and 0. 7 cm high. Find the magnitude of the vertical deflection of the elect..
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
If you take data in paris of x and y related by the equation 5x = cy^4+7. What would you graph to linearize the data. Linearize it and what would the slope and intercept be
An oil slick is 375 nm thick. The index of refraction of the film is 1.25. The oil slick is floating on the top of a water surface that has an index of refraction of 1.33. Sunlight falls on the oil slick. What color or colors will you see reflected d..
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