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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?
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 30 MW and lasts 2.9 ns. How many photons are emitted in this pulse
A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. They do the same amount of work, but the husband's pulling force is directed ..
0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?
Assume you knew some unstable particles have a half life of 1.00 seconds when not moving but had a half-life of 5.00 seconds while in a particle accelerator
aa projectile is fired from a gun that is 69.0m above flat ground emerging from the gun with unknown horizontal speed.
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window
an electron is a subatomic particle m 9.11x10-31 kg that is subject to electric forces. an electron moving in the x
q1. a horizontal uniform bar of mass 2.6 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is
A double slit separated by 0.0572 mm is placed 1.70 m from a screen. (a) If yellow light of wavelength 590 nm strikes the double slit, what is the separation between the zeroth-order and first-order maxima on the screen? cm (b) If blue light of wavel..
q1. consider a cylindrical segment of a blood vessel 2.9 cm long and 1.70 mm in diameter. what extra outward force
A friend of yours is loudly singing a single note at 400 Hz as driving toward you at 250 m/s on a day when the speed of sound is 340 m/s
An FM radio station of frequency 96.7 MHz puts out a signal of 29900 W. How many photons per unit time are emitted
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