Question

You are using a beaker to measure volume. the beakers graduation begin at 20ml and in indicate every 10ml up to 80 ml. the bottom of the meniscus is about three fourths of the way between 40ml mark and the 50 ml mark. you should report this number as:
a)40ml
b)47ml
c)50ml
d)47.0 ml

Answer 1

Answer:

b) 47ml

Explanation:

The beaker would look like this:

60 mL

50 mL

-------  The bottom of the meniscus is here

40 mL

30 mL

So we have between 40 and 50 mL. There are 10 mL of "distance" between those two values, and three fourths of that difference is (10 * 3/4) 7.5 mL.

So the volume is 47.5 mL, but because the measurement instrument (the beaker) does not handle decimals, the value we should report is 47 mL.