Arace car travels a circular track at an average rate of 135 mi/hr. the radius of the track is 0.450 miles. what is the centripetal acceleration of the car?

Apossible explanation for a set of facts that can be tested by further investigation is called

Which type of wave can travel without a medium

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?