What are some possible applications of carbon nanotubes?
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What are some possible applications of carbon nanotubes?
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- An energy storage system is being designed using a number of concrete blocks and electrically driven carriages, each carriage has a mass 10 000 kg, which can be raised to a certain height using electric motor driven trains using excess power from a combined solar-wind farm. Power is recovered using the same motors and releasing the concrete blocks and carriages. If the excess energy on one day is 2 GJ, the maximum height is 200 m and the efficiency is 100%, how many carriages are needed to store this energy (assume g = 10 m/s²). 4 B C O E 5 20 50 100 200Woman in the late 1980s were terrified about possible misuse of the new Roentgen x rays. What use do you think they envisioned? Please provide an original response, thank you.Locate the radial distance of the radial nodes in the 3s orbital of an H atom.a.) node closest to nucleus (in Angstroms) : b.) node farthest from nucleus (in Agstroms)
- The factory has a choice of two beta-emitting sources. Halffe Source Barlum-139 85 minutes Strontium 90 28 years State, giving your reasons, which of these sources is the most suitable for this applicationQuestion 8 a) Define the half-life of a radioactive material. b) State the relationship between half-life and activity constant.Fill the blank the Lead 214 82Pb turn to Bismuth isotop 21483Bi ، When a nucleus radiates ( ) explain your answer by the balanced nuclear equation
- What forces hold the nucleus together? And how do those forces compare in magnitude to the electrostatic force that binds the electrons to the nucleus?How can an Electron be ejected from the nucleus if an atomic nucleus doesn't contain any electrons?Q2: Answer the questions: 1- What are the difference between the shell model and liquid drop model? 2- Explain the effect of mass numbers on stability of isotopes? 3- Explain the idea of exchange force model.