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A tungsten cathode with work function 4.5 eV is heated torelease electrons that are then initially at rest outside the cathode. The electrons are accelerated by a potentialdifference to create a beam of electrons with a deBroglie wavelength of 0.038 nmCalculate momentum of an electron in the beam in kg.m/sCalculate the kinetic energy of an electron in the beam, injoulesCalculate the accelerating voltageSuppose that light, instead of heat, is used to release theelectrons from the cathoe. What minimum frequency of light isneeded to accomplish this?
a 35.0 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found.
a box is on the back of a truck the truck is moving at 64.0 kmh along a level road. if the coefficient of static
Discuss the meaning of a four-dimension space-time in relation to the Lorentz transformation. What is the geometry of this space-time called. What is the four-dimensional measure of the duration in space-time
When the power is turned off on a turntable spinning at 67.0 rpm, you find that it takes 13.0 revolutions for it to stop while slowing down at a uniform rate. What is the angular acceleration (in rad/s^2), of this turntable
In the figure, a block of mass m = 12 kg is released from rest on a frictionless incline of angle ? = 26°. Below the block is a spring that can be compressed 2.8 cm by a force of 330 N. The block momentarily stops when it compresses the spring by 6.9..
Calculate the x-component of vector. A uniform electric field of magnitude 375 N/C pointing in the positive x-direction acts on an electron, which is initially at rest.
A piece of wood is 0.600m long, 0.210m wide, and 0.08 m thick. Its density is 600kg/m3. find the mass of this volume of lead
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
A 2.62-g bullet, traveling at a speed of 417 m/s, strikes the wooden block of a ballistic pendulum, How high does the combination rise above its initial position
two blocks are connected by a rope passing through a pulley. one block is on a table and has a mass of 1kg the other is
What is the distance Delta y_max-min between the second maximum of laser 1 and the third minimum of laser 2, on the same side of central maximum.
A cyclist intends to cycle up a hill whose vertical height is 170m. Assuming the mass of bicycle plus cyclist is 75kg , calculate how much work must be done against gravity
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