Answer: I think it's false
because light travels slower in dense area's.
Answer:
<u>The blade undergoes 40 revolutions, so neither of the given options is correct! </u>
Explanation:
The revolutions can be found using the following equation:
Where:
α is the angular acceleration
t is the time = 2.5 s
is the initial angular velocity = 1500 rev/min
First, we need to find the angular acceleration:
Now, the revolutions that the blade undergo are:
<u>Therefore, the blade undergoes 40 revolutions, so neither of the given options is correct! </u>
I hope it helps you!
Answer:
Explanation:
We can start from the known formula:
so we can write, since we want the initial velocity in terms of the ball's displacement, its acceleration in the vertical direction, and the elapsed time:
and for our values we have: