The human eye has two lenses. O true O False
2 answers:
You might be interested in
This ratio (Fnet/m) is sometimes called the gravitational field strength
and is expressed as 9.8 N/kg ⇒ answer D
Explanation:
The gravitational field strength at a point is:
- The gravitational force exerted per unit mass placed at that point.
- This means that the gravitational field strength, g is equal to the force experienced by a mass of 1 kg in that gravitational field
- Gravitational field strength = Weight/mass
- Its unit is Newton per kilogram
- Gravitational field strength ≈ 9.8 N/kg
From the notes above
The ratio = Gravitational field strength (g)
The answer is:
This ratio (Fnet/m) is sometimes called the gravitational field
strength and is expressed as 9.8 N/kg
Learn more:
You can learn more about gravitational field strength in brainly.com/question/6763771
LearnwithBrainly
Answer:
A 8.0 cm diameter horizontal pipe gradually narrows to 5.0 cm. The the water flows through this pipe at certain rate, the gauge pressure in these two sections is 31.0 kPa and 24.0 kPa, respectively. What is the volume of rate of flow?
The flow rate is 3.1175×10⁻³ m³/s
Explanation:
To solve the question we rely on Bernoulli's principle as follows
thus where the pipe is horizontal we have
z₁ = z₂ hence the above equattion becomes
since the flow rate is constant then
Q = v₁A₁ = v₂A₂
Where is the area of the two sections given by A₁ = π·D₁²÷4 and
A₂ = π·D₂²÷4
Thereffore A₁ = π·0.08²÷4 = 5.02×10⁻³ m²
and A₂ = π·0.05²÷4 = 1.96×10⁻³ m²
v₁ = v₂A₂/A₁ =0.391×v₂
The given pressures are P₁ = 31.0 kPa and P₂ = 24.0 pKa and
ρ = 1000 kg/m³
Plugging the values into the above equation we get
31.0 kPa +0.5× 1000 kg/m³× (0.391×v₂)² = 24.0 pKa +0.5×1000 kg/m³×v₂²
= 31000+76.3·v₂² =24000+500·v₂²
or 423.706·v₂² = 7000
v₂² = 7000/423.706 = 16.52 or v₂ = 4.065 m/s and v₁ 0.391×4.065 = 1.59 m/s
The flow rate = v₂A₂ = 1.59×1.96×10⁻³ = 3.1175×10⁻³ m³/s