If an object moving at 12 m/s has a kinetic energy of 72 j what is the mass

Jake has a nine month old son. how can he build his self esteem

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

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?