How does a stimulant, such as an amphetamine affect attention? Select one:
a. They impair attention at all levels,
b. At low levels, they increase attention. At high levels, they impair it,
c. They increase attention at all level,
O d. At low levels, they impair attention. At high levels, they increase it

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

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.