Physics 101 lecture covers temperature, ideal gas, and thermal expansion

Physics 101: Lecture 23 Temperature and Ideal Gas ,[object Object],EXAM III Temperature of Earth’s surface/clouds from NASA/AIRS satellite

Superposition & Interference ,[object Object],[object Object],[object Object],What does C(t) = A(t) + B(t) look like?? A(  1 t) B(  2 t)

Superposition & Interference ,[object Object],[object Object],[object Object],A(  1 t) B(  2 t) C(t) = A(t) + B(t) CONSTRUCTIVE INTERFERENCE DESTRUCTIVE INTERFERENCE

Beats ,[object Object],[object Object],[object Object],where and cos(  L t)

Internal Energy and Temperature ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Zeroth law of Thermodynamics ,[object Object],[object Object]

Temperature Scales NOTE: K=0 is “absolute zero”, meaning (almost) zero KE/molecule Water boils Water freezes 212 32 Fahrenheit 100 0 Celsius 273.15 373.15 Kelvin

Sick Act ,[object Object],[object Object],[object Object],[object Object],[object Object],correct

Temp Scales ACT ,[object Object],[object Object]

Thermal Expansion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Temp: T Temp: T+  T L 0  L

Density ACT ,[object Object],[object Object],[object Object],[object Object],T = 0 C M, V 0  0 = M / V 0 T = 100 C M, V 100  100 = M / V 100 <  0 CORRECT

Differential Expansion ACT ,[object Object],A B C Aluminum gets longer, forces curve so its on outside

Swimming Preflight ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],F B =  l Vg 32 water has maximum density at 4C and buoyant force is directly proportional to density My mom went on a date with Bill Gates in the 70s!! She thought he was a dork. CORRECT (62 %)

Tight Fit Preflight ,[object Object],[object Object],[object Object],[object Object],Both are made of the same material so heating it up will mean the objects will expand at the same rate. Both the ball and the plate will expand when heated, so the diameter of the ball will increase, while the diameter of the hole will decrease, as the aluminum plate has expanded, and the ball will not fit through the hole. demo CORRECT

[object Object],Imagine a plate made from 9 smaller pieces. Each piece expands. If you remove one piece, it will leave an “expanded hole” Object at temp T Same object at higher T: Plate and hole both get larger

Stuck Lid Act ,[object Object],[object Object],[object Object],[object Object],Metal lid expands more, making a looser fit, and easier to open! CORRECT

Jar Act ,[object Object],[object Object],[object Object],[object Object],Water expands more than container, so it overflows. See example 13.3 in book

Molecular Picture of Gas ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Number Density ACT ,[object Object],[object Object],Helium atom is “lighter” than Oxygen molecule. If you have the same mass, you must have many more Helium molecules than Oxygen. So the Helium number density is larger.

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

Physics 101 lecture covers temperature, ideal gas, and thermal expansion

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