Don't know if this is a True/False questions but that is true
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Answer:
D. 550 Hz
Explanation:
Frequency for string is given by
where v is the speed of the wave, L = m is the length
Frequency is inversely proportional to the Length of the string
from above relation we can write
The newly shortened string has 4/5 the length of the full string .i,e
Hence option D is correct
All sources of energy on the planet (excluding nuclear reactions) are ultimately attributable to the sun. 'Fossil fuels' are derived from what once were living organisms, and all sources of food begin with primary producers (plants and algae which utilize photosynthesis).
Your pendulum does a complete swing in 1.9 seconds. You want to SLOW IT DOWN so it takes 2.0 seconds.
Longer pendulums swing slower.
You need to <em>make your pendulum slightly longer</em>.
If your pendulum is hanging by a thread or a thin string, then its speed doesn't depend at all on the weight at the bottom. You can add weight or cut some off, and it won't change the speed a bit.
