<span>they have to be selective permeable to filter out the waste products but allow the nutrients and blood cells to pass through. </span>
Answer:
The percentage uncertainty in the average speed is 0.10% (2 sig. fig.)
Explanation:
Consider the formula for average speed 
.
,
where
is the total distance, and 
is the time taken.
The percentage uncertainty of a fraction is the sum of percentage uncertainties in
- the numerator, and
- the denominator.
What are the percentage uncertainties in and in this question?
The unit of the absolute uncertainty in is meters. Thus, convert the unit of to meters:
.
.
The unit of the absolute uncertainty in is seconds. Convert the unit of to seconds:
Similarly,
.
The average speed here is a fraction of and . Both and come with uncertainty. The percentage uncertainty in will be the sum of percentage uncertainties in and . That is:
.
Generally, keep
- two significant figures for percentage uncertainties that are less than 2%, and
- one for those that are greater than 2%.
The percentage uncertainty in here is less than 2%. Thus, keep two significant figures. However, keep more significant figures than that in calculations to make sure that the final result is accurate.
The same force accelerates a small mass faster than
it accelerates a large mass.
It's easier to get a little red wagon going by pushing it
than it is to get a school bus going by pushing it.
Answer:
Explanation:
When the positively charged half shell is brought in contact with the electroscope, its needle deflects due to charge present on the shell.
When the negatively charged half shell is brought in contact with the positively charged shell , the positive and negative charge present on each shell neutralises each other .So both the shells lose their charges .The positive half shell also loses all its charges
When we separate the half shells , there will be no deflection in the electroscope because both the shell have already lost their charges and they have become neutral bodies . So they will not be able to produce any deflection in the electroscope.
Answer:
25
Explanation:
I looked at it and its 25
