Sonar, originally an <span>acronym for SOund Navigation And Ranging
</span>a technique that uses sound<span> propagation.</span>
As an airplane moves through the air, its wings cause changes in the
speed and pressure of the air moving past them. These changes result in
the upward force called lift.
The Bernoulli principle states that an increase in the speed of a fluid
occurs simultaneously with a decrease in the pressure exerted by the
fluid.
A wing is shaped and tilted so the air moving over it moves faster than
the air moving under it. As air speeds up, its pressure goes down. So
the faster-moving air above exerts less pressure on the wing than the
slower-moving air below. The result is an upward push on the wing—lift!
Answer:
Archimedes principle: volume of water displaced by immersed object is equal to volume of water.
so if two object has same volume but different mass
then density determines the flotation of object,if an object has more density than water then it sinks.
I think this is called as special condition of floatation.
A hydraulic arrangement consists of a water- filled U-tube that is wider on one end than on the other. Pistons are fitted in both ends.
Answer:
Part a)

Part b)

Explanation:
Part a)
As we know that the acceleration due to gravity is given as



now we know that



now we have


Part b)
As we know that the escape speed is given as



