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1. All the moderators mentioned in this chapter to slow down neutrons are light nuclei. Why are light nuclei used for moderators instead of heavy nuclei?
2. Why is ?ssion fuel placed in 4-m-long rods placed parallel but separated, rather than in one lump of mass?
3. Discuss how each of the following sources of energy is ultimately derived from the sun: wood, coal, gas, oil, water, and wind.
4. Why does a star's temperature increase as fusion proceeds? Why are higher temperatures required for the carbon cycle than for the proton-proton chain?
5. The fusion process continues in a very massive star until its core consists of nuclei near 56Fe. Explain why this occurs.
A 3.50 gram bullet is fired horizontally at two blocks resting on a smooth surface. Evaluate what is the initial speed of the bullet
In a certain electroplating process gold is deposited by using a current of 14.0 A for 19 minutes. How many grams of gold are deposited by this process
A pair of oppositely charged parallel plates are separated by a distance of 5 cm with a potential difference of 550 V between the plates. A proton is released from rest at the positive plate at the equal time that an electron is released from rest..
An electron enters a region of space containing a uniform 0.0000143 T magnetic field. Find the radius of the electron's path
A 3.00-m-long, 400 kg steel beam extends horizontally from the point where it has been bolted to framework of a new building under construction. A 74 kg construction worker stands at the far end of the beam.What is the magnitude of the torque abo..
You sing into a well and find that the well resonates at frequencies of 198 Hz and 234 Hz with no resonances between these two frequencies. What is the frequency of the fundamental mode
A photoelectron produced by ionization in a photoelectron spectrometer is ejected with a velocity of 861 km s-1. Calculate the de Broglie wavelength (in Å) of the electron
At the end of the run, she is 175 m away from the starting point at an angle of 15.0° north of west. Illustrate what were the direction and length of her second displacement? Use graphical techniques.
If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.2 m/s and the tension in the rope is T = 19.7 N. 5) Return to the original ..
A horizontal circular wire loop of radius 0.7 meter lies in a plane perpendicular to a uniform magnetic field pointing from above into the plane of the loop, has a magnitude of 0.44 T. find the magnitude of the average induced emf in the wire
The ground state energy of a harmonically oscillating electron is 1.24 eV. How much energy should be added to the electron to move it to the second excited state.
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