- #1
Gogsey
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Hi,
These are not homework problem, but problems from my textbook. I am studying for a final exam in 2nd year Modern Physics that is on Monday and need some help with question. This set will be about special and genreal relativity, and I'll post another on quantum physics.
1). How fast must a plane 50m long travel to be found by observers on the ground to be 0.10nm shorter than 50 m?
2).At eraths location, the intensityof sunlight is 1.5kW/m^2. If no energy escaped earth, by how much would Earth's mass increase in 1 day?
3). Radiant energy fromthe sun, approximately 150000000000m away, arrives at Earth with an intensity of 1.5kW/m^2. At what rate is mass beig converted on the sun to produce this radiant energy?
4). A spring has a force constant of 18N/m. If it is compressed 50cm from its equilibrium lenght, how much mass has it gained?
5). A famous experiment detected 527 muons per hour the top om Mt. Washington, New Hamptshire, eleavation 1910m. At sea levelthe same equipment detected 395 muons per hour. A discriminator selected for muons whose speed was between 0.995c and 0.0054c. Given that the mean lifetime of a muon in it res frame is 2.2 microseconds and that muons decay with the regular fotrula, prove this results are sensible.
6). A 10kg object is moving to the right at 0.6c. It explodes into 2 peices , one of mas m1 moving to the left at 0.6c and one of mass m2, moving to the right at 0.8c.
a). Find the masses of m1 and m2
b). Find the change in kinetic energy in this explosion.
7). The boron-14 nucleus (mass: 14.02266u) "beta decays" spontaneously becoming an electron(mass: 0.00055u) and a carbon-14 nucleus(mass: 13.99995u). What will be the speeds and kinetic energies of the carbon-14 nuclleus and the electron? A neutrino is also produced but in this case, its energy and momentum is negligible. Also, because te carbon_14 nucleus is is much more massive then the electron, it recoils "slowely" ( gamma =1).
8). According to an observer at the Earths eqautor, by how much would his clock and one on a satellitein geosynchronous orbit differ in one day?
Thank you
These are not homework problem, but problems from my textbook. I am studying for a final exam in 2nd year Modern Physics that is on Monday and need some help with question. This set will be about special and genreal relativity, and I'll post another on quantum physics.
1). How fast must a plane 50m long travel to be found by observers on the ground to be 0.10nm shorter than 50 m?
2).At eraths location, the intensityof sunlight is 1.5kW/m^2. If no energy escaped earth, by how much would Earth's mass increase in 1 day?
3). Radiant energy fromthe sun, approximately 150000000000m away, arrives at Earth with an intensity of 1.5kW/m^2. At what rate is mass beig converted on the sun to produce this radiant energy?
4). A spring has a force constant of 18N/m. If it is compressed 50cm from its equilibrium lenght, how much mass has it gained?
5). A famous experiment detected 527 muons per hour the top om Mt. Washington, New Hamptshire, eleavation 1910m. At sea levelthe same equipment detected 395 muons per hour. A discriminator selected for muons whose speed was between 0.995c and 0.0054c. Given that the mean lifetime of a muon in it res frame is 2.2 microseconds and that muons decay with the regular fotrula, prove this results are sensible.
6). A 10kg object is moving to the right at 0.6c. It explodes into 2 peices , one of mas m1 moving to the left at 0.6c and one of mass m2, moving to the right at 0.8c.
a). Find the masses of m1 and m2
b). Find the change in kinetic energy in this explosion.
7). The boron-14 nucleus (mass: 14.02266u) "beta decays" spontaneously becoming an electron(mass: 0.00055u) and a carbon-14 nucleus(mass: 13.99995u). What will be the speeds and kinetic energies of the carbon-14 nuclleus and the electron? A neutrino is also produced but in this case, its energy and momentum is negligible. Also, because te carbon_14 nucleus is is much more massive then the electron, it recoils "slowely" ( gamma =1).
8). According to an observer at the Earths eqautor, by how much would his clock and one on a satellitein geosynchronous orbit differ in one day?
Thank you