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In a typical electron microscope, the momentum of each electron is about 1.8 10-22 kg-m/s. What is the de Broglie wavelength of the electrons?
an oxide cathode of a vacuum tube has a work function of 2.0 eV. Calculate the electron flux (number per time per area) from thermal emission when the cathode is heated to 1000 K
The plates of a 3.1 nF parallel-plate capacitor are each 0.27 m^2 in area. If the plates are separated by a Teflon sheet, how thick is the sheet
An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 6.41 centimeter in a uniform magnetic field with B = 0.961 T. Determine its kinetic energy
a large storage tank open to the atmosphere at the top and filled with water develops a small hole in its side at a
In the figure below, the converging lens' focal length is 14.4 cm, d = 13.6 cm, and the diverging lens' focal length is -14.1 cm. Where is the image formed by the converging lens,
A 300-g block is dropped onto a vertical spring with spring constant k =180.0 N/m. find the speed of the block just before it hits the spring
A plane move through the air. This results in the air under thewing moving at speed v=50 m/s. what is the lift exerted on the plane in Newtons
An electron is observed traveling at a speed of 25.7·106 m/s parallel to an electric field of magnitude 14000 N/C. How far will the electron travel before coming to a stop?
If a container has a water level 20 cm above the base and you punch a hole in the side 12 cm high
a helicopter is lifting two crates simultaneously. one crate with a mass of 148 kg is attached to the helicopter by
A velocity selector has a magnetic field of magnitude 0.32 T perpendicular to an electric field of magnitude of 0.34 MV/m. The mass of the electron is 9.11x10-31 kg. How much energy must electrons have in order to pass through undeflected
A nuclear power plant has a reactor that produces heat at the rate of 690 MW. This heat is used to produce 250 MW of mechanical power to drive an electrical generator. At what rate is heat discarded to the environment by this power plant? MW
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