Answer:
<em><u>1)A)</u></em>
<em><u>1)A)2)A)</u></em>
<h3><em><u>Hope it helps you </u></em><em><u>♡</u></em><em><u>♡</u></em></h3>
Answer: 20580 Joules of work is done by the firefighter.
Explanation:
Work done is defined as the force times distance travelled.
work=
Given:
mass= 75 kg
acceleration due to gravity =
h= height = 28 m
Putting in the values we get,
work=
Thus 20580 Joules of work is done by the firefighter.
Answer:
The uncertainty in the volume of the sphere is
Solution:
As per the question:
Measured radius of the sphere, R = 135.4 m
Uncertainty in the radius,
We know the volume of the sphere is:
We know that the fractional error for the given sphere is given by:
where
= uncertainty in volume of sphere
Now,
Now, substituting the suitable values:
I'm too sure about this question but I think the answer to this is 4.0026
A vibrating stretched string has nodes or fixed points at each end. The string will vibrate in its fundamental frequency with just one anti node in the middle - this gives half a wave.
Rearranging for the wavelength
Therefore the longest wavelength standing wave that it can support is 14m