C D A velocity vs. time graph for an object is shown.
Which parts of the graph represents the object moving at
a constant, positive acceleration?
Velocity vs Time
25
Wand X
X and Y
20
Y
Y and Z
X
15
Velocity (m/s)
W and Z
10
Z
w
5
0
1
2
4
5
3
Time (s)
this and retum
Save and Exit
Su

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.