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A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, but the number of protons Z in the nucleus is unknown. A group of lines in the spectrum forms a series in which the shortest wavelength is 22.79 nanometers and the longest wavelength is 41.02 nanometers. Obtain the next-to-the-longest wavelength in series of lines.
The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. Illustrate at what height above the surface of the earth does the balloon have a speed of 7.20 m/s?
The wheels, axle, and handles of a wheelbarrow weigh W= 62 N. The load chamber and its contents weigh WL = 665 N. The drawing shows these two forces in two dissimilar wheelbarrow designs. To support the wheelbarrow in equilibrium, the man’s hands app..
A sonar generator on a submarine on the ocean surface produces periodic ultrasonic waves at a frequency of 2.50 MHz. How deep is the ocean floor
A spaceship is visiting Planet X. While descending to the surface, its rockets produce 25 kN of upward thrust and the spaceship's speed decreases at a rate of 0.15 m/s2. What is the mass of the spaceship
With the power supply disconnected, the dielectric material is removed and the potential difference between the plates is measured to be 500 V. What is the dielectric constant of the material that was at first used to fill the gap between the plates.
Radius=10m Vt=12.3 If at point A the track exerts a force on the car that is 2.92 × 10^4 N greater than the car's weight, what is the mass of the car.
A box is sliding up an incline that makes an angle of 27.7 ° regarding the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.113. The initial speed of the box at the bottom of the incline is 2.27 m/s...
two narrow slits 58 microm apart are illuminated with light of wavelength 540 nm. what is the angle of the m 2 bright
Commercial aircraft fly near 200mb where the outside temperate is -60 degrees Celsius. Calculate the temperature of the air if compressed adiabatically to the cabin pressure of 1000mb.
The intensity due to a number of different sources is the sum of the individual intensities. how many additional babies would be required
A 16.5-m-long cable consists of asolid-inner, cylindrical, nickel core 2.0cm in diameter surrounded by a solid-outer cylindrical shell ofcopper 2.0 cm in inside diameter and4.0 cm in outside diameter. There sistivity of nickel is 7.8*10-8 Ω · m, a..
A certain atom of has 81 protons. Assume that the nucleus is a sphere with radius 6.99 fm, compute the magnitude of the electric field produced by the protons
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