Una onda electromagnética que viaja desde el Sol a la Tierra tiene una longitud de onda R, amplitud Q, período U y rapidez de propagación T. ¿Cuál de las siguientes relaciones permite calcular directamente la frecuencia?

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.