Physics equations and constants Page 1-3

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30 Terms

1
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0th law of thermodynamics

temperature

F = (9/5 C) + 32

C = 5/9 (F-32)

K = C + 273

2
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0th law of thermodynamics

thermal expansion

ΔL = alpha LΔT

ΔV = Beta V ΔT

3
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1st law of thermodynamics

ΔU = Q-W

4
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heat

q = mcΔT

5
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specific heat of H2O

1 cal/g K = 4.184 J/ g K

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heat of transformation

q = m L

L = heat of transformation

7
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Work of a Gas

W = -PΔV

8
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structural proteins

J = kg m2 / s2

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kinetic energy

KE = ½ mv2

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gravitational potential energy

U = mgh

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elastic potential energy

U = ½ kx2

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Work

W = F d = F d cos ()

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Power

W = J/s = N m / s = kg m2 / s3

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work energy theorem

W net = ΔK = Kf - Ki

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MA of an inclined plane

MA = length of incline / height of incline

16
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Efficiency

mechanical advantage = Fout / Fin

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Dot product

A B = AB cos ()

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cross product

A B = AB sin ()

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average velocity

total displacement / total time

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average speed

total distance traveled / total time

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friction

f = μN

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torque

r F sin ()

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newtons first law

Fnet = ma = 0

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newtons second law

F = ma

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newtons third law

FAB = -FBA

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vf =

v0 + aΔT

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Δx =

v0 Δt + ½ a (Δt)2

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vf 2 =

v02 + 2aΔx

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Δx if a = 0

vΔt

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centripetal force

Fc = mv2 / r