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A monovalent bcc solid has a lattice constant 5.0 angstrom. To calculate its Fermi energy.
The energy of the lowest alllowed level for an electron in a 1-D box is 8.0eV. Will the electron ever have an energy equal to 512eV?
Physics
A metal sphere, when suspended in a constant temperature enclosure, cools from 80 0C to 70 0C in 5 minutes and cool from 70 0C to 62 0C in the next five minutes. Calculate the temperature of the enclosure.
Physics
How far will the bike in question 1 tCalculate the acceleration in each of the following cases:
(a) v = 22 ms; u = 8 ms'; t = 2.65
(b) a ball starts at rest and after 30 m its velocity has reached
4.8 ms
(c) in 15 s, a train moves 100 m from restiravel in the 10-second time period?
(a) v = 22 ms; u = 8 ms'; t = 2.65
(b) a ball starts at rest and after 30 m its velocity has reached
4.8 ms
(c) in 15 s, a train moves 100 m from restiravel in the 10-second time period?
The length of a metal wire is drawn and doubled. How many times will the new resistance of the wire become?
Physics
T=2π√l\g,if l=50.0+\-0.2cm and the time for 15 oscillations are:24.2,24.2,24.7,24.5,24.2,24.2,24.4,24.5,24.6,24.7,24.5,24.6,24.5,24.3, determine the value of g and the standard error in g
How long will it take a 50W heater to melt 100g of ice at 0 celsius degree
Describe why numerical modelling of stellar structure requires both outward and inward integration calculation. Also,describe an iterative method to minimize the difference in the values of both outward and inward calculations.
For temperature around 1.5×10^7k in a stellar core,describe why it is hydrogen instead of heaviour ions which undergo fusion.Also,when the temperature is higher, describe why higher mass ions can undergo fusion.
In the outer core of a massive star the temperature is 10^8k.The mean particle weight is meo=0.62.calculate the density of this region if the radiation pressure is equal to thermal pressure.
