A heater is placed along the side of an aquarium. A convection current will transfer heat throughout the aquarium as___. A. Hot water rises and cold water sinks

B. Hot water sinks and cold water rises

C. Hot water spreads from the heater in all directions

D. Water rises and sinks in an ever-changing pattern

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?