un muchacho de 65kg y una muchacha de 45kg ambos se encuentran en patines sobre un pista de hielo. el muchacho empuja a la muchacha y ella se mueve hacia el oeste con una velocidad de 3m/s encuentre la velocidad de retroceso del muchacho

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Select all the correct answers. which three statements about electromagnetic radiation are true?