The wavelength of the note is
. Since the speed of the wave is the speed of sound,
, the frequency of the note is
Then, we know that the frequency of a vibrating string is related to the tension T of the string and its length L by
where
is the linear mass density of our string.
Using the value of the tension, T=160 N, and the frequency we just found, we can calculate the length of the string, L:
Answer:
C. the break down of food to create energy in the presence of oxygen
Explanation:
Answer:
D
Explanation:
The wavelength of A falls in the range of 700 nanometers to 1 millimeter. It is Infra red
The wavelength of B falls in the range of 450 nanometers to 740 nanometers. It is visible light
The wavelength of C falls in the range of 10 nanometers to 400 nanometers. It is Ultraviolet.
The wavelength of D falls in the 0.01 nanometers to 10 nanometers. It is x ray.
At theheight where it starts, just before it's dropped, the ball has
some potential energy. The higher that spot is, the more potential
energy the ball has. After the drop, whenever the ball is lower than
the height from which it was dropped, it has less potential energy, and
the missing potential energy shows up as kinetic energy ... motion.
This is the whole idea of the roller coaster. A machine drags it up to
the top of the first hill, giving it lots of potential energy. After that, as
long as it doesn't try to rise higher than the first hill, it never runs out
of energy, and keeps going.
A). and B).
The ball keeps going forward until it rises again to the same height it
was dropped from ... on the other side. Then it stops and falls back.
C). The ball can never rise higher than the height it was dropped from.
If the hump in the middle is the same height as the drop-height, then
the ball stops right there, and falls back.
D). Same as B). As long as the track inside the loop is never higher
than the droop-height, the ball just keeps going forward.
E). Same idea. Here it looks like the drop-height is the same as the
top of the loop. The ball can't rise higher than it was dropped from,
so it gets as far as the top of the loop and stops there. From there,
I think it drops straight down from the top of the loop, instead of
following the curve.
F = 1/T = 20,000 so T = 1/20,000
<span>distance = speed * time </span>
<span>L = 343 T </span>
<span>L = 343/20,000 </span>
<span>L =. 01715 meters or about 1.7 centimeters</span>
