Answer:
The wavelength of the sound wave traveling at 330 m/s is 0.5 m.
Explanation:
Given:
Speed of sound wave is, ![v=330\ m/s](https://tex.z-dn.net/?f=v%3D330%5C%20m%2Fs)
Frequency of the sound wave is, ![f=660\ Hz](https://tex.z-dn.net/?f=f%3D660%5C%20Hz)
Speed of a sound wave is related to its frequency and wavelength as:
, where,
is the wavelength.
Now, plug in 330 for
, 660 for
and solve for
. This gives,
![330=660\lambda\\\lambda=\frac{330}{660}=0.5\ m](https://tex.z-dn.net/?f=330%3D660%5Clambda%5C%5C%5Clambda%3D%5Cfrac%7B330%7D%7B660%7D%3D0.5%5C%20m)
Therefore, the wavelength of the sound wave traveling at 330 m/s is 0.5 m.
By definition,
Momentum = Mass * Velocity.
Therefore the velocity, v, is determined by
(30000 kg-m/s) = 400 kg)(v m/s)
30000 = 400v
v = 30000/400 = 75 m/s
Answer: 75 m/s
You betcha !
-- Work is done whenever a force acts through a distance.
-- The skydiver has weight. That's the force acting on him.
-- As time goes on, I'm assuming that he falls from one height
to a lower height. That's the distance the force acts through.
-- The work done on him is (force) times (distance)
(his weight) x (distance he falls).
So where is the machine that does all this work ?
-- It's GRAVITY that does the work on him as he falls.
So how did he get all this energy in the first place ?
Where did it come from ?
-- From the airplane that lifted him up to height from which he jumped !
An object in motion stays in motion, while an object at rest will stay at rest, otherwise known as inertia. So, a rolling ball will stay in motion if it's moving, whereas if it's being held in you hand and resting, it won't!