1. Un disco de 12cm de radio gira a 450 r. p.m. Calcula el valor de la velocidad angular en rad/s. 2. Un disco de 40 cm de radio gira a 33 r. p.m. Calcula el valor de velocidad angular en rad/s.

Respuesta: 47,13; 3.456

Explicación:

Dado que la velocidad angular 'ω' = Conversión a radianes por segundo:

Para convertir a radiante por segundo:

1. Divida el valor en revolución por minuto entre 60, en otro para obtener el valor en revolución por segundo.

2. Luego, el valor obtenido se multiplica por 2π, lo que indica una revolución completa en otro para obtener el valor en radianes por segundo.

A.) ω = 450 r.p.m o 450 revoluciones por minuto.

450 r.p.m = 450/60 × 2π

450 r.p.m = (7.5) × 2 × 3.142 = 47.13 rad / sec

B.) ω = 33 r.p.m o 33 revoluciones por minuto.

33 r.p.m = 33/60 × 2π

33 r.p.m = (0.55) × 2 × 3.142 = 3.456 rad / sec

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50