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
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Su

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air