True. You need to know what is below you when you are building thins or else your building could collapse because you didn't know what type of Earth was below you.
Floods. Monsoons are massive rainstorms which can often bring devastating floods to low ground. Hope I helped!
Answer:
a) calculating the concentration at which 50% of the test organisms of a particular species die
Explanation:
Bioassays -
<u>Bioassays is an analytical method to assess the effect of marine pollutant on the organism by estimating the concentration at which 50% of the test organisms die after exposing the test organisms for a specified time.</u>
It can be done by quantitative or by qualitative experiment , or direct or indirect .
It is used to detect the biological hazards or give the quality assessment of the mixture .
It is also used for the monitoring the quality of water .
First turn 18% to a decimal, which is .18, then multiply it by 450.
450 x .18 = 81
Answer:The angular seperation is 
Explanation:
For two objects separated by a distance 's' and at a distance 'd' from the observer the angular separation ignoring the physical effects is given by
In the given question
light years
We know that in 1 light year there are 
Using the calculated values we get
Since π radians equals 180 degrees thus we have
