Un vagónabierto de ferrocarril viaja a la derecha con rapidezde 13.0/relativa a un observador que estáparado en tierra. Alguiense mueve en motoneta sobre el vagónabierto. ¿Quévelocidad(magnitud y dirección) tiene la motoneta relativa al vagónabierto si su velocidad relativa al observador en el suelo es a) ¿18.0 m/sa la derecha? b) ¿3.0 m/s a la izquierda? c)¿Cero?

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers