why is it necessary to adjust the height of the graduated cylinder when measuring the volume of co2 (g) produced? group of answe
1 answer:
3. The height of the graduated cylinder when measuring the volume of co2 (g) produced is adjusted to equalize the pressure in the graduated cylinder with the atmospheric pressure.
We discovered that when the water level within the graduated cylinder is higher than the water level outside, the gases inside the graduated cylinder have a lower pressure than the atmospheric pressure. It would then be possible to equalize pressure by changing the graduated cylinder's water level to match the water level outside.
Therefore last option or 3rd option is the correct choice.
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Explanation:
Relation between length of a curve and angle is as follows.
l =
where, R = radius of curve
= angle in radians
Also, l = .......... (1)
If curve has a degree of curvature for standard length s, then
R = ........... (2)
Now, substitute the value of R from equation (2) into equation (1) as follows.
l =
If s = 30 m, then calculate the value of l as follows.
l =
=
= 452 m
thus, we can conclude that the length of the curve is 452 m.