We read your photo as:

A student is sucking liquid through a straw. The diagram shows the liquid levels in the straw and the surrounding container. a) (i) Using a letter on the diagram, state where she places her mouth. (ii

Physics

ScanSolve AI Answer

Step-by-step solution

3 steps

Here are the answers to question 4:

a) (i) Using a letter on the diagram, state where she places her mouth.
The student places her mouth at position P.

a) (ii) Explain why the displacement occurs.
When the student sucks at position P, the air pressure above the water column on that side is reduced. The higher atmospheric pressure acting on the water surface at position R then pushes the water down on the R side and up on the P side, causing the observed displacement.

b) Determine the pressure difference caused by the sucking.

  1. Identify the given values and the height difference.

    Density of water, ρ=1000 kg/m3\rho = 1000 \text{ kg/m}^3
    Acceleration due to gravity, g=10 m/s2g = 10 \text{ m/s}^2 (standard approximation)
    Height of water on the left side = 10 cm10 \text{ cm}
    Height of water on the right side = 13 cm13 \text{ cm}
    The difference in height, hh, is the difference between the two water levels:

    h=13 cm−10 cm=3 cmh = 13 \text{ cm} - 10 \text{ cm} = 3 \text{ cm}

  2. Convert the height difference to meters.

    h=3 cm=0.03 mh = 3 \text{ cm} = 0.03 \text{ m}

  3. Calculate the pressure difference using the formula ΔP=ρgh\Delta P = \rho g h.

    ΔP=1000 kg/m3×10 m/s2×0.03 m\Delta P = 1000 \text{ kg/m}^3 \times 10 \text{ m/s}^2 \times 0.03 \text{ m} ΔP=300 Pa\Delta P = 300 \text{ Pa}

    The pressure difference caused by the sucking is 300 Pa\boxed{300 \text{ Pa}}.

Was this helpful?

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question

More Physics Questions

QOn the diagram, label the parts A to D. 1. (c) (ii) State what happens at A, B and C.QFill in the blanks: (i) The liquid part of blood is called . (ii) Digestion begins in the . (iii)…QStudy the diagram below then answer the items (i-v) that followQThe diagram below represents some gaseous exchange structures in humans. Name the structures…QBased on the diagram, name the liquid in A and B and state the observation made in the combustion…
See all Physics questions →
Got a syllabus? Photograph it and I'll tell you what's due and what's worth the most.
Handwritten step-by-step solution preview

Handwritten Step-by-Step Solution

Get this as a handwritten image on WhatsApp — like a tutor wrote it for you.

Try on WhatsApp