<h2>
Answer:5
![ms^{-1}](https://tex.z-dn.net/?f=ms%5E%7B-1%7D)
,133.6
![m](https://tex.z-dn.net/?f=m)
,51.18
![ms^{-1}](https://tex.z-dn.net/?f=ms%5E%7B-1%7D)
</h2>
Explanation:
Let
,
be the horizontal and vertical components of velocity.
Question a:
Horizontal component of velocity is the ratio of range and time of flight.
So,horizontal component of velocity is ![\frac{235}{47}=5ms^{-1}](https://tex.z-dn.net/?f=%5Cfrac%7B235%7D%7B47%7D%3D5ms%5E%7B-1%7D)
So,![v_{x}=5ms^{-1}](https://tex.z-dn.net/?f=v_%7Bx%7D%3D5ms%5E%7B-1%7D)
Question b:
Time of flight=![\frac{2v_{y}}{g}](https://tex.z-dn.net/?f=%5Cfrac%7B2v_%7By%7D%7D%7Bg%7D)
So,![v_{y}=\frac{47\times 9.8}{2}=51.18ms^{-1}](https://tex.z-dn.net/?f=v_%7By%7D%3D%5Cfrac%7B47%5Ctimes%209.8%7D%7B2%7D%3D51.18ms%5E%7B-1%7D)
Maximum height is given by ![\frac{v_{y}^{2}}{2g}](https://tex.z-dn.net/?f=%5Cfrac%7Bv_%7By%7D%5E%7B2%7D%7D%7B2g%7D)
So,maximum height is ![\frac{51.18^{2}}{2\times 9.8}=133.6m](https://tex.z-dn.net/?f=%5Cfrac%7B51.18%5E%7B2%7D%7D%7B2%5Ctimes%209.8%7D%3D133.6m)
Question c:
The vertical velocity is already calculated in Question b.
![v_{y}=51.18ms^{-1}](https://tex.z-dn.net/?f=v_%7By%7D%3D51.18ms%5E%7B-1%7D)
Well it's energy comes from the sun since the sun gives it sunlight to help it grow
Answer:
there will be no cracks so the trash won't get stuck
Answer:
D. Frozen water is less dense than liquid water.
Explanation:
Titanic sank in the North Atlantic Ocean in the year 1912. There were more than 2000 passengers on board from which about 1500 died.
Frozen water that is ice has less density than liquid water. The density of ice is
and the density of the water is
.
Due to this very slight difference in density, ice floats on water. Titanic, on the night of April 14, 1912, crashed into an iceberg around midnight which caused opening of 5 of its watertight compartments. The water filled into the ship and it eventually sank in.