None of the choices is correct.
If two runners take the same amount of time to run a mile,
they have the same average speed. But their velocities
are not the same unless both runners begin and end their
run at the same points.
Speed is (distance covered) divided by (time to cover the distance).
Velocity is not. It's something different.
'Velocity' is not just a bigger word for 'speed'.
1m = 1000 mm
0,4m = 0,4 * 1000 = 400mm
Answer:
a)
, b)
, c)
, d)
, e) The direction of the centripetal acceleration experimented by the gum goes to the center of rotation, f) Zero, g)
.
Explanation:
a) The maximum angular velocity of the fan is:


b) The angular acceleration of the fan is:



c) The magnitude of the tangential aceleration is:


d) The magnitude of the centripetal acceleration is:


e) The direction of the centripetal acceleration experimented by the gum goes to the center of rotation.
f) When fan is at full speed, it rotates at constant rate and, hence, there is no angular acceleration. Besides, the tangential acceleration experimented by the gum is zero.
g) The linear speed of the gum is:


Answer:
<h2>Ok I choose Copper and Zinc , Here is your answer⤴️⤴️</h2><h3>Hope it's helpful for you mark me as brainlist please</h3>