Post Test: Forces and Motion Select the correct answer.
Which segment of this graph shows a decreasing velocity?
y
80
60
D E
Position (m)
40
B
20
0
10 20 30 40 50 60 70 80 90 100
Time (s)
х
OA. A to B
B.
B to C
OC. Cto D
ODD to E
OE. Eto F

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?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.