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The graph at right shows the temperature of 350 grams of an unknown substance as it is cooled from a gas to a solid by extracting a constant.
Classically for this reaction to happen, the protons must come close enough to each other to "touch". Assume the proton is a uniformly charged.
Compare and contrast the processes of fusion and fission. Describe the challenges in harnessing fusion technology for domestic energy needs.
It has been estimated that the Earth contains 109 metric tons of natural uranium that can be mined economically.
Shortly after detonation the fireball of a uranium fission bomb consists of a sphere of gas radius 15 m and a temperature 3E5 K.
What fraction of the initial number of C-11 atoms in a sample will remain after 81 minutes?
Uranium is one the rarer elements in the earths crust, where it occurs mainly as the oxide uraninite (U3O8).
Explain why it is positive or negative feedback, describing the entire cycle from beginning to end.
What types of benefits and downfalls could you see happening with this type of policy?How do you feel about this policy?
Compute the gravitational force between the sun (M=1.99 x 10^30 kg) and the planet Uranus (m=14.5 ME , orbital radius r=19.2 AU).
How would you feel if your township decided they wanted to build one very close to your home?
A hypothetical planet has a radius 2.5 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface?
Derived by Albert Einstein at the beginning of the 20th century it summarizes the equivalence of energy (E) and mass (M) .
A rifle bullet with mass .010 kg stikes and embeds itself with a block of mass .990kg which rests on a frictionless horizontal surface.
In the picture two spheres of mass m and a third sphere of mass M form an equilateral triangle and a fourth sphere of mass m 4 is at the center of the triangle
When we look at stars in the sky we see a wide range of brightness. Explain the factors that would make one star appear brighter than another.
Consider a nuclear power plant that produces 1000 MW of power and has a conversion efficiency fo 30%.
Determine the energy (in joules) released by the complete fissioning of 0.9 gram of 235nucleons 92protonsU.
If the energy released per 23592U fission is 2.0e2 MeV, how many kilograms of coal must be burned to produce the same energy.
How many bound states does the particle have in a well of depth V_0 / 4 and width 2L? In a well of depth 4V_0 and width L/2?
Can an electron be confined in a nucleus? Answer the question using the following outline or some other method?
A spacecraft is in orbit around Jupiter. The radius of the orbit is 3.0 times the radius of Jupiter (RJupiter = 71,500 km).
Consider a small, natively disordered protein that exists in equilibrium with a highly ordered (folded) protein.
The weight of a object is the same on two different planets. The mass of planet A is only sixty percent that of planet B. Find ra/rb, which is the ratio
Doubly ionized lithium, Li^2+, absorbs a photon and jumps from the ground state to its n = 3 level. What was the wavelength of the photon?