According to the plot, the positions at time <em>t</em> = 0 s and <em>t</em> = 19 s are -1 m and -2 m, respectively. So the average velocity for the 19-s interval is
When someone lifts a book from the ground, the work you use is positive. By lifting the book, you change it's energy and it's original place The book gains, kinectic energy.
Hope I helped.
Answer:
= 16 , length will be decreased by a factor of 16
Explanation:
- One octave apart corresponds to twice the frequency and thus half the length. Two octaves apart will correspond to 4 times the frequency and the length will be reduced by a factor of 4, that is 1/4 of the length.
- Three octaves apart on the other hand corresponds to 8 times the frequency, thus length will be decreased by a factor of of 8, that is 1/8 of the length .
- Four octaves apart corresponds to 16 times the frequency, therefore the length will be decreased by a factor of 16, that is 1/16 of the length.
D.
Electromagnets are easier to control due to this feature.
