If a solid changes right to a gas, it's called sublimation. If a gas changes directly to a solid, it's called deposition.
Answer:
Power, P = 300 W
Explanation:
We have,
Force acting on the box to take it is 300 N
It is moved to a distance of 10 m in 10 seconds
It is required to find the power required to move the box. The rate at which work is done is called power required by an object. It can be given by the formula as follows :
![P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}\\\\P=\dfrac{300\times 10}{10}\\\\P=300\ W](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7BW%7D%7Bt%7D%5C%5C%5C%5CP%3D%5Cdfrac%7BFd%7D%7Bt%7D%5C%5C%5C%5CP%3D%5Cdfrac%7B300%5Ctimes%2010%7D%7B10%7D%5C%5C%5C%5CP%3D300%5C%20W)
So, the power required is 300 W.
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Answer: 250 ml of stock solution with molarity of 12.0 M is measured using a pipette and 250 ml of water is added to volumetric flask of 500 ml to make the final volume of 500 ml.
Explanation:
According to the dilution law,
![C_1V_1=C_2V_2](https://tex.z-dn.net/?f=C_1V_1%3DC_2V_2)
where,
= concentration of stock solution = 12.0 M
= volume of stock solution = ?
= concentration of diluted solution= 6.00 M
= volume of diluted acid solution = 500 ml
Putting in the values we get:
![12.0\times V_1=6.00\times 500](https://tex.z-dn.net/?f=12.0%5Ctimes%20V_1%3D6.00%5Ctimes%20500)
![V_1=250ml](https://tex.z-dn.net/?f=V_1%3D250ml)
Thus 250 ml of stock solution with molarity of 12.0 M is measured using a pipette and 250 ml of water is added to volumetric flask of 500 ml to make the final volume of 500 ml.