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Unreasonable Results
A frazzled theoretical physicist reckons that all conservation laws are obeyed in the decay of a proton into a neutron, positron, and neutrino (as in β+ decay of a nucleus) and sends a paper to a journal to announce the reaction as a possible end of the universe due to the spontaneous decay of protons.
(a) What energy is released in this decay?
(b) What is unreasonable about this result?
(c) What assumption is responsible?
In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10m, and the distance between the slits is 0.100 mm. What is the wavelength of the light
Two moles of an ideal gas undergo a reversible isothermal expansion from 3.10×10^?2m^{3} to 5.00×10^?2m^{3} at a temperature of 27.0C. What is the change in entropy DeltaS of the gas
Identical objects are located at the same distance from two spherical mirrors, A and B. Find the ratio fA/fB of the focal lengths of the mirrors
A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. How many pennies can be placed in the racquetball boat without sinking it
A 3.0-cm-diameter parallel-plate capacitor with a spacing of 0.300 mm is charged to 500 V. What is the total energy stored in the electric field
A huge space cruiser passes earth at speed c/2. It launches a small fighter ship away from earth (thank goodness) at speed c/2 relative to the cruiser. What is the speed of the fighter ship relative to earth
A tank contains benzene, which has index of refraction1.50. A dime is on the botton of the tank. What is the actual depth of the benzene
What is the minimum speed you must give the air at the top. find its final kinetic energy.
An evacuated tube uses an accelerating voltage of 44.0 kV to accelerate electrons to hit a copper plate and produce x rays. Non-relativistically, what would be the maximum speed of these electrons?
Determine how many hours are required for the earth to rotate through 1radian in 1 second of time through how many seconds of arc does the earth rotate
A man pushes horizontally with a force of 280 Newton on a 60 kilogram crate to move it across a level floor. The coefficient of kinetic friction is 0.35. Estimate what the magnitude of the frictional force
imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. never mind how you would hold the
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