At 20 ◦C, a rod is exactly 20.05 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 270 ◦C, where the rod now measures 20.11 cm on the same ruler. What is the coefficient of linear expansion for the material of which the rod is made? Take αsteel = 1.2 × 10−5 K−1 .

The coefficient of expansion is

∝=1.56*10^-5/C

Explanation:

The problem is based on linear expansivity

The linear expansivity of a solid is the fractional increase in length per unit degree rise in temperature.

It is given as

∝=ΔL/ΔT

Given L1=20.5cm to m =20.5/100

=0.205m

L2=20.11cm to m= 20.11/100

= 0.2011nlm

T1=20°c

T2=270°c

∝=0.2011-0.205/270-20

∝=0.0039/250

∝=0.0000156

∝=1.56*10^-5/C

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop