Leaning against a brick wall.
All the others use scientific forces of work.
-Steel jelly.
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
Substituting into the equation, we have;

Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.
Answer: Photoreceptor cell, Chemoreceptor, Thermoreceptor, Mechanoreceptor
Hope this helps(:
Explanation:
Yep. he discovered that coastline from south america and africa fit together like a puzzle, which later became a part of the continential drift theory
D-It will become a temporary magnet because the domains will easily realign.