Poder Nuestro

YOUNG • FREEDIMAN

SEARS • ZEMANSKY

FÍSICA

dJNIVERSITARIA

VOLUMEN 1

FACTORES DE CONVERSION DE UNIDADES

Longitud

1 m = 100 cm = 1000 mm =

1 km = 1000 m = 0.6214 mi

1 m = 3.281 ft = 39.37 in

1 cm = 0.3937 in

1 in. = 2.540 cm

1 ft = 30.48 cm

1 yd = 91.44 cm

lmi = 5280 ft = 1.609 km

1À = 10" 10 m = 10~ 8 cm = 10"

1 milla nàutica = 6080 ft

1 anoluz = 9.461 X 10 15 m

lOVni = 10 9 nm

Aceleración

1 m/s 2 = 100 cm/s 2 = 3.281 ft/s 2

1 cm/s 2 = 0.01 m/s 2 = 0.03281 ft/s 2

1 ft/s 2 = 0.3048 m/s 2 = 30.48 cm/s 2

lmi/h-s = 1.467 ft/s 2

Masa

1 kg = 10 3 g = 0.0685 slug

1 g = 6.85 X 10" 5 slug

1 slug = 14.59 kg

1 u = 1.661 X 10~ 27 kg

1 kg tiene un peso de 2.205 lb cuando g

9.80 m/s 2

Àrea

1 cm 2 = 0.155 in 2

1 m 2 = 10 4 cm 2 = 10.76 ft 2

1 in 2 = 6.452 cm 2

1 ft = 144 in 2 = 0.0929 nr

Volumen

1 litro = 1000 cm 3 = 10~ 3 m 3 = 0.03531 ft 3 = 61.02 in 3

1 ft 3 = 0.02832 m 3 = 28.32 litros = 7.477 galones

1 galón = 3.788 litros

Tiempo

1 min = 60 s

1 h = 3600 s

1 d = 86,400 s

1 aflo = 365.24 d = 3.156 X 10 7 s

Angulo

1 rad = 57.30° = 180°/tt

1° = 0.01745 rad = 7ï7180rad

1 revolución = 360° = 277 rad

1 rev/min (rpm) = 0.1047 rad/s

Rapidez

lm/s = 3.281 ft/s

1 ft/s = 0.3048 m/s

1 mi/min = 60 mi/h = 88 ft/s

1 km/h = 0.2778 m/s = 0.6214 mi/h

1 mi/h = 1.466 ft/s = 0.4470 m/s = 1.609 km/h

1 furlong/14 días = 1.662 X 10~ 4 m/s

Fuerza

1 N = 10 5 dinas

1 lb = 4.448 N =

= 0.2248 lb

4.448 X 10 5 dinas

Presión

1 Pa = 1 N/m 2 = 1.450 X 10~ 4 lb/in 2 = 0.209 lb/ft 2

1 bar = 10 5 Pa

1 lb/in 2 = 6895 Pa

1 lb/ft 2 = 47.88 Pa

1 atm = 1.013 X 10 5 Pa = 1.013 bar

= 14.7 lb/in 2 = 2117 lb/ft 2

1 mm Hg = 1 torr = 133.3 Pa

Energia

1 J = 10 7 ergs = 0.239 cal

1 cal = 4.186 J (con base en caloria de 15°)

1 ft - lb = 1.356 J

1 Btu = 1055 J = 252 cal = 778 ft • lb

leV = 1.602 X 10~ 19 J

1 kWh = 3.600 X 10 6 J

Equivalència masa-energía

1 kg <-> 8.988 X 10 16 J

luo 931.5 MeV

leV<-> 1.074 X 10"%

Potencia

1W= 1 J/s

1 hp = 746 W = 550 ft • lb/s

1 Btu/h = 0.293 W

CONSTANTES NUMERICAS

Constantes físicas fundamentales*

Nombre

Símbolo

Valor

Rapidez de la luz

c

Magnitud de carga del electrón

e

Constante gravitacional

...