You are examining a questioned document for erasures. After using a microscope and UV light, you are unable to clearly identify signs of erasure. What other material would you use to locate evidence of erasure,
A)
graphology
B
Griess test
Lycopodium powder
D)
gas chromatography

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate