Practice Pakistan questions with answers and explanations.
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Wave speed equals frequency multiplied by wavelength.
Using v=fλ gives the stated result.
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Thermodynamic quantities describe heat, work and internal energy.
The selected statement follows their definitions and the first law.
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Wave speed equals frequency multiplied by wavelength.
Using v=fλ gives the stated result.
Choose an option to check your answer.
Thermodynamic quantities describe heat, work and internal energy.
The selected statement follows their definitions and the first law.
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Conservation of mass for steady incompressible flow gives A₁v₁=A₂v₂.
Solving gives the stated speed.
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Conservation of mass for steady incompressible flow gives A₁v₁=A₂v₂.
Solving gives the stated speed.
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For horizontal flow, P + ½ρv² is constant.
The pressure drop is ½ρ(v₂²−v₁²).
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For horizontal flow, P + ½ρv² is constant.
The pressure drop is ½ρ(v₂²−v₁²).
Choose an option to check your answer.
For horizontal flow, P + ½ρv² is constant.
The pressure drop is ½ρ(v₂²−v₁²).
Choose an option to check your answer.
For horizontal flow, P + ½ρv² is constant.
The pressure drop is ½ρ(v₂²−v₁²).
Choose an option to check your answer.
For horizontal flow, P + ½ρv² is constant.
The pressure drop is ½ρ(v₂²−v₁²).
Choose an option to check your answer.
Fluid motion follows force balance and conservation principles.
The stated explanation matches the described flow condition.
