The position-time graph describes the motion of a moving object. Describe the motion represented by each segment of the graph. not
moving
constant
speed
speeding
up
slowing
down
y
annel
80
E
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с
D
Position (m)
В.
40
20
А
+
0
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Time (s)

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

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

Does heating a metal wire increase or decrease its electrical resistance? why?