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Question: The stopping potential for photoelectrons emitted from a photocathode surface illuminated by light of wavelength 491nm is 0.63V. When the wavelength is changed to a new value, the stopping potential is found to be 1.43V.
a. What is the new wavelength?
b. What is the work function of the surface?
c. Use Table to identify the material of which this photocathode might be made.
a long solenoid has 500 turns. a current of 2 A is passed through it, the resulting magnetic flux linked with each turn of a solenoid is 4x1/1000wb
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What angular resolution would you need to see the Sun and Jupiter as distinct points of light if you were looking at it from 15 light years away
A 405 Hz tuning fork and a piano key are struck together, and no beats are heard. When a 402 Hz tuning fork and the same piano key are struck, three beats are heard. What is the frequency of the piano key?
A nearsighted person has a near point of 12 cm and a far point of 17 cm. If the corrective lens is 2.0 cm from his eye, what lens power will enable this person to see distant objects clearly?(answer should be in diopters)
What percentage of an initial sample of 131I remains after 20.0 days?
A laser beam is incident on two slits 0.100 mm apart and a screen is placed 4 m from the slits. An interference pattern appears on the screen. what is the wavelength of the laser light
When the power to an electric motor is turned on the motor reaches its rated speed of 2400 rpm in 4s, and when the power is turned off the motor coasts to rest in 40s.
The plates of a capacitor are separated by a distance of 11mm. Each plate contains a charge of 19 uC. The electric field between the plates is 640 V/m. What is the capacitance of the capacitor
Write the introduction of about two pages and the literature review parts of two or three pages about fundus camera.
the membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space.
A solid cylinder of radius 1.5 m has a uniform volume charge density of 15 C/m3. Find the magnitude of the electric field at 1.25 m from the axis of the cylinder. what will your gaussian surface be? Make a sketch of the solid cylinder and the gauss..
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