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What is two dimensional things?
It is flat. 2-D
What are 2 things that are two meters long?
Height of a door
Can people concentrate on two thing at one time?
do people do one thing at a time
What is the sum of something?
What you get when you add two things together. 1 + 1 = 2. The sum of 1 and 1 is 2.
How would a scientist make 500 ml of a 2 to 5 dilution of concentrate?
The wording is important here. If it is a 2 *in* 5 dilution, then the scientist would need 200 ml of concentrate. The best way would be to take a graduated cylinder, put about 200 ml of solvent into the cylinder. Then put in the 200 ml of concentrate. Then add enough additional solvent to make a total of 500 ml. Mix, then pour it into a labeled and dated bottle, and screw on the lid. If it is a 2 *to* 5 dilution, then you need 2/7ths concentrate, and 5/7ths solvent. One seventh of 500 ml is about 71.43, so you would need 142.86 ml of concentrate, and fill the rest with solvent until the total is 500 ml.
