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Photons with a frequency of 7.8 multiply.gif 1015 Hz shine on a piece of molybdenum (work function = 4.2 eV). What is the energy of the ejected electrons?
What is the de Broglie wavelength of the ejected electrons?
A certain source of sound waves radiated uniformly i alldirections. At a distance of 15m from the source the intensitylevel is 30dB. What is the intensity of the sound 15m from the source inW/m2
A 230 kilogram crate rests on a surface that is inclined above the horizontal at an angle of 19.4 degree. Find coefficient of static friction between crate and incline
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released, What is the mass of the second ball
a variable capacitor consists of two thin coaxial metal cylinders of radii a and b with b-altlta free to move with
A high power cell phone tower radiates microwave power at a level of P=50W. Calculate the Intensity (in units of W/m2) on the surface of a sphere of radius 100m. (The radiation is not isotropic, but the gain factor makes up for this)
An ocean liner leaves New York City and travels 13° north of east for 268 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the following directions.
The magnetic field produced by an MRI solenoid 2.7m long and 1.7m in diameter is 1.9T. Find the magnitude of the magnetic flux through the core of this solenoid
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.250uC on each plate. The plates are 0.600mm apart. What is the surface charge density on each plate
Certain natural forms of potassium have nuclei that are radioactive. Each radioactive potassium nucleus decays to a slightly less massive daughter nucleus and a high-speed electron called a beta particle.
A single loop of conducting wire with an area of 7.3 x 10-2 m2 has a resistance of 110 Ω. A magnetic field of strength 0.18 T is perpendicular to the plane of the loop of wire.
A 57.3-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.770 and 0.405, What horizontal pushing force is required to just start the crate moving
Which one of the following statements regarding internal energy is FALSE?
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