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Light of frequency 7.0×1014 Hz is directed on a particular metal surface. An energy of 4.0 × 10-19 J = w is required to remove an electron from the surface of the metal.
a) Find the maximum KE of the emitted electron
b) What color light was used?
c) What color of light will just ionize the metal ( Hint: KE will be zero).
A PuBe source has a neutron activity of 1.6 X 105 Bq. The neutrons are produced by the 9Be(a, n)12C reaction with an effective cross section of 90 mb and thickness of 3.2 cm. What is the probability of an incident alpha particle interacting with a 9B..
A 89.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.53 rad/s. Find the angular velocity of the platform with its load
Katie and Emily are riding on a circular merry-go-round that has a radius of 5 m. Katie is on a horse that is 2.5 m from the center of merry-go-round and Emily is on a tiger that is 4.5 m from the center of the merry-go-round.
You stand on the surface of the moon (which is too small to have an atmosphere) and throw a rock of mass 2.50 kg straight upward with an initial speed 40.0 m/s. What maximum height above the surface of the moon will the rock reach
Water entering a house flows with a speed of 0.20 m/s through a pipe of 2.4 cm inside diameter. What is the speed of the water at a point where the pipe tapers to a diameter of4.5 mm
A constant electric field E=100 N/C*i is present throughout a region of space that includes the plane bounded by the x, compute The electric flux at the plane's surface
What is the radius of curvature of the mirror. How far would it coast before starting to roll back down.
A certain corner of a room is selected as the origin of a rectangular coordinate system. what is the location of the fly in polar coordinates
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 434 N and F2 = 387 N. What is the resultant of these two forces
galvanometer with a coil resistance of 14.7 is used with a shunt resistor to make a nondigital ammeter that has an
Find an article dealing with a paleo anthropological discovery. Write 2 to 3 pages summary. Can you send on time, please
Do sound waves exhibit diffraction effects? If so, determine the "slit" width that would diffract an audible sound wave (frequency between 20 Hz and 20 kHz). Would a doorway work or do you need a different sized opening?
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