During convection, hot material (expands & sinks, cools & rises, expands & rises, deflates & rises) then moves to the side and ( cools & sinks, deflates & rises, expands & sinks, warm & rises) this circular pattern is called a convection current.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

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?