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4 years ago

The pressure extered by fluid at any given depth is exerted _____ in all directions

Physics

1 answer:

Blababa [14]4 years ago

8 0

The pressure exerted by fluid at any given depth is exerted equally in all directions.

<h3><u>Explanation:</u></h3>

Pressure is defined as the force per unit area. Hydraulic force is the force that is exerted by liquid to a particle which is present somewhere inside the liquid. This pressure is exerted by the liquid particles from each part of the of the whole mass.

As far as the upper particles are concerned, the liquid exerts the force due to gravity, which acts downwards. Similarly, the particles which are down to the particle in liquid gives the reaction force which is based on Newton's third law of motion. This makes the force acts from all sides.

This is the reason why a particle which is submerged stays still, as there's no unbalanced force which can turn the particle.

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3 years ago

An observer moving toward Earth with a speed of 0.84 c notices that it takes 5.1 min for a person to fill her car with gas. Supp

stealth61 [152]

Answer:

t₂=6.35min

Explanation:

t₁ = first observed time (=5.1 min)

t₂ = unknown; this is the quantity we want to find

V₁ = observer's initial speed (=0.84c)

V₂ = observer's final speed (=0.90c)

Lorentz factors for V₁ and V₂:

γ₁ = 1/√(1−(V₁/c)²)

γ₂ = 1/√(1−(V₂/c)²)

The "proper time" (the time measured by the person filling her car) is:

t′ = t₁/γ₁

The proper time is stated to be the same for both observations, so we also have:

t′ = t₂/γ₂

Combine those two equations and solve for t₂

t₂ = t₁(γ₂/γ₁)

t₂= t₁√((1−(V₁/c)²)/(1−(V₂/c)²))

$t_{2}=5.1\sqrt{\frac{1-(0.84)^{2} }{1-(0.9)^{2} } }\\\\t_{2}=6.348min$

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