Answer:
P₂ = 138.88 10³ Pa
Explanation:
This is a problem of fluid mechanics, we must use the continuity and Bernoulli equation
Let's start by looking for the top speed
Q = A₁ v₁ = A₂ v₂
We will use index 1 for the lower part and index 2 for the upper part, let's look for the speed in the upper part (v2)
v₂ = A₁ / A₂ v₁
They indicate that A₂ = ½ A₁ and give the speed at the bottom (v₁ = 1.20 m/s)
v₂ = 2 1.20
v₂ = 2.40 m / s
Now let's write the Bernoulli equation
P₁ + ½ ρ v₁² + ρ g y₁ = P2 + ½ ρ v₂² + ρ g y₂
Let's clear the pressure at point 2
P₂ = P₁ + ½ ρ (v₁² - v₂²) + ρ g (y₁-y₂)
we put our reference system at the lowest point
y₁ - y₂ = -20 cm
Let's calculate
P₂ = 143 10³ + ½ 1000 (1.20² - 2.40²) + 1000 9.8 (-0.200)
P₂ = 143 103 - 2,160 103 - 1,960 103
P₂ = 138.88 10³ Pa
Answer:
upthrust or BUOYANT FORCE =Vdg
volume=LWH
upthrust=(4cm×5cm×2cm)×1g/cm²×g
upthrust=40cm³×1g/cm³×g
upthrust=40gf or 0.04kg×10m/s²=0.4N
weight of the displaced liquid is upthrust.
so mass=40g or 0.04kg
upthrust=40gf or 0.4Nand mass of the displaced liquid=40g or 0.04kg
please mark brainliest, hope it helped
Answer:
Temperature and pressure.
Explanation:
The phase of any substance is depend on the temperature as well as pressure. Because if the substance is change from its solid state to liquid means melting occur, we are going to increase its temperature at a particular pressure affect.
And humidity also change the pressure but we here consider the pressure so we can neglect the humidity.
The phase does not depend on the amount of substance the rate of change of phase is not change with respect to amount of substance.
Therefore, the phase of change of substance is depends on temperature as well as on pressure.
Acceleration of the car is 2 m/s²
Explanation:
- Force is calculated by the equation, F = Mass × Acceleration
- This is based on Newton's Second Law of Motion which states that the force acting on an object is its mass times the acceleration of the object.
- Here, force = 2000 N and mass = 1000 kg
Acceleration = Force/Mass
= 2000/1000 = 2 m/s²
