if you increase area what happens to atmospheric pressure? and what are electromagnetic waves?? thanks!!!?

Question

i have a physics final tomorrow...other answers i cant find:
what is heat?
what is specific heat
what determines specific heat
" " thermal conductivity
what is heat of vaporization?
what is heat of fusion?
what happens when the velocity of a gas decreases?
- if 40 liters of a gas are cooled to 97 degrees kelvin at a constant pressure, and the starting temp of the gas was 86 deg kelv- what is the new volume (and how do you do that problem??)

THANK YOU SO MUCHHH!!!

Answer 1

At,ospheric pressure is independent of surface area.

Electromagnetic waves are part of the electromagnetic spectrum and include radio waves, microwaves, infra-red, visible light, ultra-violet, x-rays, and gamma rays.

Heat is thermal energy.

Specific heat is the number of Joules per unit mass of a material required to raise its temperature by 1°C

Specific heat is an intrinsic characteristic of matter, nothing 'determines' it except the matter involved.

Thermal conductivity is a measure of how well heat energy flows through a material. Most metals are fairly good conductors of heat. Things such as wood or plastic are thermal insulators.

Heat of vaporization is the excess heat needed to convert a material from a liquid to a gaseous state.

Heat of fusion is the excess heat required to convert a material from a solid to a liquid state.

When teh velocity of a gas decreases, it's pressure increases (Bernoullis Law).

use PV=nRT. Then (86/97)*40 = 35.46 L

HTH

Doug

Answer 2

Heat is thermal energy associated with the different movement of atoms.
Specific heat is the heat per unit mass required to raise the temperature by one degree Celsius.
Specific heat is determine by this equation:
Q=cm Delta T temperature.
Thermal conductivity is the ability for a substance to absorb heat and this sometimes called latent heat absorption.
Heat vaporization is the required amount of heat to turn a substance int into a gas. This is usually measure at boiling point.
Hat of fusion is the amount of heat needed to absorb to change a substance from a solid to a liquid.

- if 40 liters of a gas are cooled to 97 degrees kelvin at a constant pressure, and the starting temp of the gas was 86 deg kelv- what is the new volume (and how do you do that problem??)

For this you will need Charles's Law: stated as

V1/T1 =V2/T2

Identify the given:
V1= 40 Liters
T1= 97K
V2 = ?
T2 = 86 K
rearrange the equation to this form to solve.

T2V1 /T2 = V2... substitute the value..

(97 K) (40 L) / 86 K = 45.1 Liters. That is the volume.

Answer 3

You're screwed, buddy. I hope you go to class more often the next time you take it. haha.