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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 pulse from a ruby laser (lambda = 694.3 nm) has an average power of 20 MW and lasts 2.3 ns. What is the total energy of the pulse
The concepts for finding the change in length of a rod.
Relative to the ground, determine the angle of the velocity vector of the package just before impact.
On a particular afternoon in Houston, the nitrogen (N2) molecules in the air have an rms speed of 515 m/s. What is the rms speed of the carbon dioxide (CO2) molecules
A bottle containing 2 kg of water at a temperature of 15°C is placed in a refrigerator where the temperature is kept at 4°C.
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm, What are the fractions of muscle and fat in the leg
Incident photons strike a soduim surface having a work function of 2.2 eV, causing photoelectric emission. What is the wavelength of the incident photons
A series of RLC circuit has R=200 ohms, L=40.0mH and C=120pF. What is the impedance of this circuit at resonance
If the system is stopped, how much hanging mass would be required to bring the rotating mass to the same position.
An Escort and a Camaro traveling at right angles collide and stick together. The Escort has a mass of 1200 kg, What was the speed of the Camaro
Find out the drill's angular acceleration. Determine the angle through which the drill rotates all through this period.
A beam of particles is directed at a 0.0178 kg tumor. There are 1.56×1010 particles per second reaching the tumor, Calculate the biologically equivalent dose (in rem) given to the tumor in 26.8 s.
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