Pascal's law states that when there is an increase in pressure at any point in a confined fluid, there is an equal increase at every other point in the container.A hydraulic lift for automobiles is an example of a force multiplied by hydraulic press, based on Pascal's principle. The fluid in the small cylinder must be moved much further than the distance the car is lifted.

Thrust is the total force acting perpendicular to the surface. The unit of thrust is Newton. The force acting (thrust) per unit area is called pressure.

Both are correct statements but reason is not the correct explanation of assertion .

Since due to applied force on liquid, the pressure is transmitted equally in all directions inside the liquid. That is why there is no fixed direction for the pressure due to liquid. Hence hydrostatic pressure is a scalar quantity.

The level of water does not change. The reason is that on drinking the water (say m gm), the weight of man increases by m gm and hence water displaced by man increases by m gm, tending to raise the level. However, this much amount of water has already been consumed by the man. Therefore the level of pond remain same.

In a stream line flow of a liquid, according to equation of continuity av= constant. Av = constant. Where a is the area of cross section and v is the velocity of liquid flow. When water flowing in a broader pipe enters a narrow pipe, the area of cross-section of water decreases therefore the velocity of water increases.

According to Bernoulli's theorem, P + 1/2 Pv2 = a constant i.e. when velocity is large, the pressure is less in a stream line flow of an ideal liquid through a horizontal tube.

According to Bernoulli's equation,

Thus, total energy of the injectable medicine depends upon second power of the velocity and first power of the pressure. It implies that total energy of the injectable medicine has greater dependence on its velocity. Therefore, a doctor adjust the flow of the medicine with the help of the size of the needle of the medicine with the help of the size of the needle of the syring a₁v₁ = a₂v₂ ​rather than the thumb pressure.

Height of the blood column in the human body is more at feet than at the brain. As P=hρg, therefore the blood exerts more pressure at the feet than at the brain.

Net force = actual weight ? upthrust force = Actual weight ? Weight of liquid displaced. The body will rise above the surface of liquid to such an extent that the weight of the liquid displaced by the immersed part of the body (i.e. upward thrust) becomes equal to the weight of the body. Thus the body will float when upward thrust is more than its actual weight. In this special case the density of solid body is less than the density of liquid.

Since the weight of water displaced by ice is equal to weight of ice. Now when this ice will melt, it will occupy the same volume of mass it has replaced earlier.

As a man jumps-out from a height in air with a parachute, its velocity increases first, because the gravity pull dominates the viscous drag and buoyancy of air which opposes the motion. As the velocity increases, the viscous drag of air also increases and soon a stage is reached where viscous drag and buoyancy of air balances the gravity pull. Then the man with a parachute falls with a constant velocity, called terminal velocity.