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An electron with electric charge of 1.6 x 10-19 C falls through a potential difference of 41 kV in the vacuum of an X-ray tube. What is the kinetic energy of the electron, assuming it started from rest and that there is no loss of energy to friction? (Note:1 volt = 1 joule/coulomb.)
Answer = ________________
A bubble is held at a radius of 250 m. The transmural pressure difference is 2 mmHg. What is the tension in the wall
Compute the De Broglie wavelength a) an electron with a kinetic energy of 100 eV, (b) a proton with a kinetic energy of 100 eV, (c) an electron in the first Bohr orbit of a hydrogen atom.
What is the angle of incidence that will result in maximum polarization for light reflected from the surface of liquid of index of refraction nliquid = 1.24? Express your answer in degrees and assume that the other medium is air.
A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 415 N walk on the overhanging part of the plank before it just ..
Tritium (31H) is an unstable isotope of hydrogen; its mass, including one electron, is 3.016049u. Determine the total kinetic energy of beta decay products
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer, What is the mass of the unknown element
q1. an iron plate 30 cm thick is magnetized to saturation in a direction parallel to the surfaces of the plate. a 20
The surface of the Sun has a temperature of about 5918 K. Determine the total energy radiated by the Sun each day
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 720-kg helicopter rises from rest to a speed of 8.5 m/s in a time of 4.0 s. Through this time it climbs t..
A glass camera with an index of 1.55 is to be coated with acryolite film (n ˜ 1.30) to decrease the reflection ofnormally incident green light (λo = 500nm). What thickness should be deposited on the lens
A 0.17kg ball is thrown vertically upwards with a velocity of 34m/s at the edge of a 22m cliff. Neglect air resistance. calculate The height to whcih the ball rises above the cliff
A ball is thrown upward from the ground with an initial speed of 20.2 m/s; at the same instant, another ball is dropped from a building 10 m high. After how long will the balls be at the same height
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