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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 grating has 600 rulings per mm and is 6.0 mm wide. What is the smallest wavelenght interval that can be resolved in the third order at ? = 500 nm? How many orders can be seen? Assum normal incidence of light on the grting throughout.
A woman on a bridge 104 m high sees a raft floating at a constant speed on the river below, She drops a stone from rest in an attempt to hit the raft, Find the speed of the raft
A certain thin, uniform rod has a mass of 2 kg and length 3 m. To what shorter length must you trim it (discarding the smaller part) so that the remaining length has half the original moment of inertia about its end.
Two different simple harmonic oscillators have the same natural frequency (f=9.10 Hz) when they are on the surface of the Earth. Calculate the new frequency of the vertical spring and mass
A nickel crystal is used as a diffraction grating for x-rays. Then the same crystal is used to diffract electrons. what is the kinetic energy of each electron
in 17.69 seconds you compress a spring of spring constant 153.33 N/m from its equilibrium length of 6.5 cm to a length of 18.16 cm. What is your average power
an organ pipe is 2.0m long.Assume the pipe is cylindrical with one closed and one open end. what is the longest wavelength for a standing sound wave
Oppositely charged parallel plates are separated by 4.79 mm. How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.06 mm from the positiveplate
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 2100 V/m, Calculate the radius r of the path for a singly charged ion with mass m = 2.29 10-26 kg
A bug (2 grams) crawls from the center to the edge of a disk that is freely turning at 20 rpm. What is the disk's new angular speed
Two sinusoidal waves of the same period, with amplitudes of 7.0 and 9.0 mm, What is the phase constant of the other wave
A diver completes somersaults during a 2.1 sec dive. What was the diver's average angular speed during the dive
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