A star's apparent brightness<span> is its </span>brightness<span> seen from Earth. A star's </span>absolute brightness<span> is the </span>brightness<span> the star would have if it were at a standard distance from Earth
</span>so if your riding in a car at night and your passing some one on the road in there point of view your apparent brightness is lets say 10 and if your are farther a way your estimated brightness or star's absolute brightness would be 10.<span />
Carbon is harmful to the earth, as known. And when it reaches water it’ll effect humans in many ways, it’ll usually make the water more acidic! And for us humans it’s harder to filter the water.
The probability that an F1 plant will be tall when it is cross with a heterozygous tall pea plant when crossed with a short plant is 50%. This is because there is only one tall and one short. Therefore, the likelihood is kin to a coin flip.