Peoples Physics Book Version-3

http://www.ck12.org Concept 27. Equations and Fundamental Concepts

PV=NkT=nRT

Fbuoy=−(ρwaterVdis placed)g

Qin=W+ 4 U+Qout

W=P 4 V

k=

1

2

ρv^2 ;u=ρgh

η=W/Qin;ηCarnot= 1 −(Tlow/Thigh)

k= 1. 381 × 10 −^23 J/K

ρair= 1 .29 kg/m^3

R= 8 .315 J/mol-K

ρwater=1000 kg/m^3

PAT MOSPH= 101 ,000 N/M^2

Navo= 6. 022 × 1023 mol−^1

Properties of Fundamental Particles

mproton= 1. 6726 × 10 −^27 kg

qelectron=−qproton=− 1. 602 × 10 −^19 C

rhydrogen atom≈ 0. 529 × 10 −^10 m

melectron= 9. 109 × 10 −^31 kg

1 amu= 1. 6605 × 10 −^27 kg= 931 .5 Mev/c^2

4 E= 4 mc^2

mneutron= 1. 6749 × 10 −^27 kg

Radioactivity, Nuclear Physics, and Quantum Mechanics

( 4 x)( 4 p)≈h/ 4 π

λ=h/p

N=N0

(

1

2

)

t/tH

1 ev→1240 nm

(energy of a photon)