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A 200KeV electron (i.e., an electron having kinetic energy of 200KeV) collides with a 200KeV positron (a particle with opposite charge of electron but) moving in the opposite direction in a head-on collision. The electron-positron pair annihilate each other and emit two equal-energy photons. (a) Write the law of conservation of energy for this process putting in all appropriate values. (b) write the law of conservation of momentum for this process putting in all appropriate values.
A copper weight is placed on top of a 0.23 kg block of wood (density = 0.60 x10^3 kg/m3) floating in water. What is the mass of the copper
express the potential difference between the plates.
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 15 m/s at an angle of 32° above the horizontal. (a) How long does it take for the ball to reach the wall if it is 4.2 m away? ..
What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light
In an experiment of centripetal force you have a rotating mass of 500 grams, which is at 5 cm from the axis of rotation. Calculate the angular velocity of the rotating mass
If 5.40 moles of a monatomic ideal gas at a temperature of 320 K are expanded isothermally from a volume of 1.41 L to a volume of 4.03 L
An oil-filled capacitor has square parallel plates 26{\rm cm} on a side, separated by 0.47{\rm mm}. Find the dielectric constant of the oil
What is the tension in the string
Two very thick equally-magnetized square plates of side 0.23m and of mass 20 g, are hung by threads 20.0 cm long from a common point. Calculate the magnetic field energy stored between the two plates
A fisherman reels in 15.0 m of line while landing a fish, How much work does the tension in the line do on the fish
Two sinusoidal waves of the same period, with amplitudes of 7.0 and 9.0 mm, What is the phase constant of the other wave
Two concentric metallic spheres of radii r1 and r2> r1, respectively, are maintained at temperatures T1 and T2, and are separated by a layer of homogeneous material thermal conductivity k.
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