The answer is commensalism because commensalism is a relationship where an organism is benefitted and the other is neither benefitted nor harmed. The barnacle is being benefited and the whale is not being benefited or harmed.
Answer:
1600 N
Explanation:
pascals principle says..

so lets do

so multiply one half (2/4 simplified) by 3200
1600 is equal to x
1600 N
YAAAAAAAAAAAAAAY
Answer:
A solar powered spacecraft could not operate in the umbral shadow but could operate in penumbral shadow.
Based on the fact that the student is moved twice as far from the center of the earth, her new weight will be 112.5 N.
<h3>What is her new weight?</h3>
When the student was moved by the same distance from the center of the earth, her weight was halved.
When she was then moved twice as far, her weight was halved again.
This means that her new weight is:
= 450 x 1/2 x 1/2
= 450 x 1/4
= 112.5 N.
Find out more on weight at brainly.com/question/2537310.