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Use the Bohr model to calculate the wavelength λ of the photon emitted when the electron in a hydrogen atom falls from the n = 5 level
The electron in a hydrogen atom is in the first excited state, What is the quantum number n of the state into which the electron moves
At a pressure of 0.0760 atm a constant-volume ideal gas thermometer reads a temperature of 345 K. What is the thermometer's triple point pressure, Pt
A pair of narrow slits are .075 mm apart and are located 1.5 m from the screen. Find the wavelength of the beam
A singly ionized helium atom (He+) has only one electron in orbit about the nucleus. What is the radius of the ion
Light of wavelength 720nm falls on two slits and produces an interference pattern in which the fourth-order fringe is 46mm, What is the separation of the two slits
A wheel has an initial angular velocity of (-24rad/s). If it atteins an angular velocity of (3rad/s) in time of 2 min, copmpute the centripetal acceleration
Two protons, each having a speed of 0.970c in the laboratory, are moving toward each other. Determine the momentum of each proton in the laboratory
An engine has a maximum theoretical efficiency of 45%. If the temperature difference between the input, what is the exhaust temperature
A 1000-kg sports car (including the driver) crosses the rounded top of a hill (radius = 90.0m ) at 22.0m/s. Determine the normal force exerted by the road on the car
What is the half life of the sample if the decay rate decay rate decreases from 175 KBq to 12.4kBq in 18 seconds
Atomic physics, you begin with 227 over 89. Then there is an alpha decay, What isotope is left after EACH of the decays
A particle with a mass of 0.420 kg is attached to a horizontal spring with a force constant of 34.02 N/m. At the moment t = 0, Find the length of a simple pendulum with the same period
A certain camera has f-numbers that range from 1.1 to 28. If the focal length of the lens is 40 mm, what is the range of aperture diameters for the camera
A vertical spring of spring constant 140N/m supports a mass of 80g. The mass oscillates in a tube of liquid. Estimate the damping constant b
If an electron in a hydrogen atom makes a transition from the n = 7 to the n = 1 state, what is the wavelength of the photon emitted
A particular atomic energy state is characterized by a principle quantum number n = 4. How many orbital subshells are possible
A lighted candle is placed 36 cm in front of a converging lens of focal length f1= 13 cm, calculate the position and relative size of the final image
A brass rod with a length of 1.40m and a cross-sectional area of 2.37cm2 is fastened end to end to a nickel rod with length L and cross-sectional area 0.720cm2, What is the strain in the nickel rod
A gas with initial conditions (P,V,T)i expands isothermally until the final volume=8.192 times the initial volume, find the ratio of the final pressure to the intial pressure
The length of a beam increases by 2.45mm when its temperature is raised from 27.74oC to 76.79 oC. What is the length of the beam at the initial temperature
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 12.9 W. What is HooRU's temperature
Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, What is the magnitude of the upper person's force
Two microscope slides are placed one on top the other. They are in contact at one end but a hair separates them at the other end. What is the thickness of the hair
A 23 g ice cube at -4.6 oC is place in an aluminum cup whose initial temperature is 80.56 oC. What is the mass in grams of the cup