Answer:
Means to increase drag and prevent sinking is the correct answer.
Explanation:
Plankton avoid sinking by increasing their surface area and decreasing their density. Spines slow down sinking by adding surface area without increasing density. Defense against predation would be to sing below. Not the opposite.
Fifty/fifty because each makes half of one whole coin.
Answer:
F = 25000 N
Explanation:
It is given that,
Pressure exerted by the object, P = 1000 Pa
Area of cross section, A = 25 m²
We need to find the force exerted on an object. The pressure exerted by an object is equal to the force acting per unit area. So,

So, the force exerted on an object is 25000 N.