Answer:
Because if they dont research first they will be unprepared
Explanation:
Answer:
28.73 m from the base of the cliff collide happen
Explanation:
Equation for ball dropped from 50 cliff is reaches distance x in t seconds isi given by
![x=ut+\frac{1}{2} at^2\\\\x= 0 \times t+\frac{1}{2} gt^2 =\frac{1}{2} gt^2......(1)](https://tex.z-dn.net/?f=x%3Dut%2B%5Cfrac%7B1%7D%7B2%7D%20at%5E2%5C%5C%5C%5Cx%3D%200%20%5Ctimes%20t%2B%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%20%3D%5Cfrac%7B1%7D%7B2%7D%20gt%5E2......%281%29)
stone is thrown up from the bottom with speed u=24 m/s . it reaches distance y when stone collide with ball.(g is negative here)
![y=24t-\frac{1}{2} gt^2.............(2)](https://tex.z-dn.net/?f=y%3D24t-%5Cfrac%7B1%7D%7B2%7D%20gt%5E2.............%282%29)
we know that total distance traveled by ball and stone is 50 m
![x+y=50 m](https://tex.z-dn.net/?f=x%2By%3D50%20m)
adding equation 1 and 2, we get time t
![x+y=\frac{1}{2} gt^2+24t-\frac{1}{2}gt^2\\50=24t\\t=2.083 s](https://tex.z-dn.net/?f=x%2By%3D%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%2B24t-%5Cfrac%7B1%7D%7B2%7Dgt%5E2%5C%5C50%3D24t%5C%5Ct%3D2.083%20s)
substitute this time in equation 2, we can get the required distance where they collide
![y=24t-\frac{1}{2} gt^2\\y=24\times 2.083-\frac{1}{2}\times 9.8\times 2.083^2\\y=28.73 m](https://tex.z-dn.net/?f=y%3D24t-%5Cfrac%7B1%7D%7B2%7D%20gt%5E2%5C%5Cy%3D24%5Ctimes%202.083-%5Cfrac%7B1%7D%7B2%7D%5Ctimes%20%209.8%5Ctimes%202.083%5E2%5C%5Cy%3D28.73%20m)
28.73 m from the base of the cliff collide happen
Boiling points are raised by hydrogen bonds because they make different molecules desire to "attach" to one another, which requires more energy to do so. In water, for instance, the hydrogen proton is in a state that resembles ionization because the connections between oxygen and hydrogen, while covalent, are strongly polar. The oxygen also receives a partial negative charge. Therefore, hydrogen bonds are formed when the electro-positive H in one molecule is strongly electrostatically attracted to the electro-negative O in nearby molecules. Despite being weak links, they are powerful enough to significantly alter the liquid's characteristics.
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>> ROR
Answer:
Ratio is used as a means of comparison of two or more subjects. It contain two or more digits which gives more information on the number of times an amount of number or times can be derived from the other/others.
An example of a ratio is 5:4 , 2:3 etc.
A ratio is also known as a noun and it can be used in sentences as follows:
The ratio of males to females in the school is five to eight. This can be translated as 5:8 in terms of mathematical expression.