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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 sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
A cube of ice is taken from the freezer at -8.7°C and placed in a 97 g aluminium calorimeter filled with 351 g of water at the room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of an ice cube.
The resonant LC circuit in your radio contains a coil with L = 0.363 mH inductance. By turning the radio knob you adjust the capacitor to C = 34.1 pF. What is the wavelength of the radio waves your radio is receiving?
two bicycles approach one another each traveling with a speed of 8.50 ms.i if bicyclist a beeps a 315-hz horn what
At time t=0 a grinding wheel has an angular velocity of 22.0 rad/s. It has a constant angular acceleration of 32.0 rad/s^2 until a circuit breaker trips at time t = 2.00 s. What was the wheel's angular acceleration as it slowed down
A Cessna aircraft has a liftoff speed of 120 km/h. How long does it take the aircraft to become airborne
A parallel-plate capacitor has plates of dimension 1.5cm x 3.0cm separated by a 1.5mm thickness of paper, what is the capacitance of this device
q1. what must the charge sign and magnitude of a particle of mass 1.47 g be for it to remain stationary when placed in
An 8.0-kg block is set moving with an initial speed of 6.0 m/s on a rough horizontal surface. how far does the block travel before it stops
write a four to six page paper in which you1.follow the five steps of persuasion establishing credibility
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
A system with a volume of 100L is initially empty, and then it is filled completely with water. What fraction of water exists as a liquid when 100kg are put into the system
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