Which of the following t explain why you can lift heavy objects more easily when they are in water? a. archimedes' principle b. pascal's principle c. bernoulli's principle d. flow rate equation

A. Archimedes' principle

Explanation:

When an object is submerged into the liquid then due to Archimedes principle we can say that the upthrust on the object due to liquid is equal to the weight of the liquid displaced by the object.

So when heavy object is in air then the force to lift the object upwards is equal to the weight of the object

so it is given as

now if the object is submerged into the liquid then it will have upthrust due to liquid on it which is same as the weight of liquid displaced by it

so here net force required to pull it up is given as

so correct answer is

A. Archimedes' principle

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue