A Silver Coin Is 0.01 Cm Thick and Has Radius of 1.50 Cm at 20 Celsius. Calculate the Change in Its?
Posted by junkgurl in Junk Silver Coin FAQ, tags: 0.01, 1.50, Calculate, Celsius., change, coin, radius, silver, thickQuestion by Lala: A silver coin is 0.01 cm thick and has radius of 1.50 cm at 20 Celsius. Calculate the change in its?
A silver coin is 0.01 cm thick and has radius of 1.50 cm at 20 Celsius. Calculate the change in its
a. Thickness
b. Area
c. Volume
d. Density
When its temperature is increase to 70 degree Celsius. Density of silver at 20 degree Celsius is 10.5 per g cc. ( Coefficient of Linear Thermal expansion of silver is 19 x 10^6/Celsius)
Please help me
Thankyou
Best answer:
Answer by billrussell42
linear thermal expansion coef silver is 18e-6 per C
∆L/L = α∆T
∆A/A = 2α∆T
∆V/V = 3α∆T
thickness:
.01 cm = 0.1 mm = 100 µm
NO coin is that thin, you must have copied it wrong. I'll do the calc, you will have to modify it.
∆L = αL∆T = 18e-6 x 50 x 100 = 0.09 µm or 90 nm
Area or volume, calculate the area or volume, and apply one of the above equations
Change in density is the same as change in volume, as the mass is constant.
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Originally posted 2010-11-23 23:52:48. Republished by Blog Post Promoter
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