Thermal Energy Flashcards

1
Q

What are the three methods of heat transfer?

A

Conduction, Convection, Radiation

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2
Q

What is the equation for Power?

A

Q/T

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3
Q

What is the equation for the rate of Conduction?

A

Q/t = kA(Th-Tc/d)

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4
Q

What is the equation for thermal expansion?

A

Change in Length = aLchange in temperature
Where a is the coefficient of thermal expansion

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5
Q

What are the equations for Newton’s Law of Cooling?

A

dQ/dt
-hAchngT(t)
-hA(T(t) - Tenv)
Where T(t) is object temp at time t

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6
Q

What increases for hotter objects?

A

Peak Wavelength

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7
Q

What is a black body?

A

An object that absorbs all electromagnetic radiation of all wavelengths and can emit all wavelengths

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8
Q

What is Wein’s Displacement Law?

A

Ymax = 2.93x10^-3 / T

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9
Q

What is Stefan’s Law?

A

P = EOAT^4

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10
Q

What is the Equation for Intensity?

A

P / 4pid^2

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11
Q

What is a U value and its units

A

heat loss per second per square meter for 1K temperature difference
Wm^-2K^-1

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12
Q

What is the P loss equation?

A

U Value x A x change in temp

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13
Q

How to change Celsius to kelvin

A

+273

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14
Q

What is internal energy?

A

KE + PE

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15
Q

What is the Zeroth Law of Thermodynamics?

A

If two thermodynamic systems are each in equilibrium with a third one the systems will be in equilibrium with each other

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16
Q

What is the Specific Heat Capacity?

A

The amount of energy needed to raise the temperature of 1kg of a substance by 1K

17
Q

Specific Heat Capacity Equation

A

Q = mc changeintemperature
or
Q = IVt

18
Q

What is the equation for Thermal Power

A

P = mcchangeintemperature / t

19
Q

What is the equation for specific latent heat?

A

Q = mL where L is specific latent heat
or
L = Q / m1 - m0

20
Q

How to calculate internal energy?

A

3/2nRT