Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s. what is your acceleration?
a. 2 m/s2
b. 5 m/s2
c. 4 m/s2
d. 3 m/s2

Which statement best describes how private industry decides where to spend the money on research and development

In what direction does the medium move relative to the direction of the wave? explain.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?