Explain how a Dewer flask prevents energy loss by conduction:
Extended exposure can cause hearing loss. Is this sensorineural hearing loss or conduction hearing loss? Explain. Next, visit this Centers for Disease Control and Prevention website. At what decibel levels can you expect to start experiencing damage to your hearing with 2 hours of exposure?
Conduction band Energy gap, Valence band The energy gap between the valence band and the conduction band in the widely-used semiconductor gallium arsenide (GaAs) is A - 1.424 eV. Suppose that we consider a small piece of GaAs with 1020 available electrons, and use the equilibrium condition derived in the prelecture. 1) On average, how many electrons will be in the conduction band if T-282.15 K? electrons Submit 2) How many holes (the white dots in the figure) will be...
1.(a)Explain the differences between conduction and valence band with the aid of an energy diagram (b)Mention seven differences between charge and current (c)Explain why ammeters are connected in series but not parallel (d)Explain why always a voltmeter is connected in parallel but not in series
GaAs laser (a) The degenerate occupation of the conduction and valence bands with electrons and holes helps to maintain the laser requirement that emission must overcome absorption. Explain how the degeneracy prevents band-to-band absorption at the emission wavelength of 867 nm (b) Assuming equal electron and hole concentrations, and same effective masses for electrons and holes, calculate the minimum carrier concentration n -p for population inversion in GaAs at 300 K. The intrinsic carrier concentration at 300 K in GaAs...
Please explain how to read the conduction velocity in this LabScribe image (Earthworm's Ventral Nerve)
(a) What is the rate of energy loss in watts per square meter through a glass window 2.3 mm thick if the outside temperature is -8°F and the inside temperature is +72°F? W/m2 (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 7.5 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? W/m2
MgO prevents premature evaporation of Al in a furnace by maintaining the aluminium as Al2O3. Another type of matrix modifier prevents loss of signal from the atom X that readily forms molecular carbide, XC, in a graphite furnace (a source of carbon). For example, adding yttrium to a sample containing barium increases that barium signal by 30%. The bond dissociation energy of YC is 30% greater than that of BaC. Explain what is happening to increase the signal.
HSTS spoils most of our fun on real websites. Research HSTS and explain how HSTS prevents the SSLstrip vulnerability.
(a) What is the rate of energy loss in watts per square meter through a glass window 2.2 mm thick if the outside temperature is -20°F and the inside temperature is +80°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 6.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of...
(a) What is the rate of energy loss in watts per square meter through a glass window 3.5 mm thick if the outside temperature is -22°F and the inside temperature is +73°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 5.5 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of...