Which of the following describes a properly controlled experiment?
a. five radish seeds are planted in an outdoor garden that gets lots of sun and water.
b. fifteen turtles are fed iceberg lettuce and vitamins, while another fifteen turtles are fed only iceberg lettuce.
c. a poll is taken to determine the most popular web site ever.
d. twenty mice are fed doughnuts every day and their weight is measured after two months.

ya the other dude is right

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.