Neco Model Questions Vol1 2018 Geography Question 50

Practice objective / multiple choice question 50 from the 2018 Neco Model Questions Vol1 Geography examination.

Neco Model Questions Vol1 2018 Geography Objective / Multiple Choice Medium Difficulty
Question 50 NECO_MODEL_QUESTIONS_VOL1 • 2018 • GEOGRAPHY • objective

At latitude \(45^{\circ}\text{N}\) two points A and B lie 200 km apart along an east‑west line. The sea‑level pressure at A is \(1010\ \text{hPa}\) and at B is \(1000\ \text{hPa}\). Assume air density \(\rho = 1.2\ \text{kg\,m}^{-3}\).\n\n(a) Compute the magnitude of the pressure‑gradient force per unit mass (PGF) between the points.\n(b) Using the Coriolis parameter \(f = 2\Omega\sin\phi\) with \(\Omega = 7.2921\times10^{-5}\ \text{rad\,s}^{-1}\), find the geostrophic wind speed.\n(c) State the wind direction relative to the isobars.

Answer Options

A. PGF ≈ 0.0042 m s⁻² westward; geostrophic wind speed ≈ 40 m s⁻¹ flowing southward (parallel to the isobars with low pressure to the right).
B. PGF ≈ 0.0021 m s⁻² eastward; geostrophic wind speed ≈ 20 m s⁻¹ flowing northward (parallel to the isobars with low pressure to the left).
Correct Answer C. PGF ≈ 0.0042 m s⁻² eastward; geostrophic wind speed ≈ 40 m s⁻¹ flowing northward (parallel to the isobars with low pressure to the left).
D. PGF ≈ 0.0063 m s⁻² eastward; geostrophic wind speed ≈ 60 m s⁻¹ flowing northward (parallel to the isobars with low pressure to the left).
Correct Answer
C
Correct Option:
PGF ≈ 0.0042 m s⁻² eastward; geostrophic wind speed ≈ 40 m s⁻¹ flowing northward (parallel to the isobars with low pressure to the left).

About This Question

This is Neco Model Questions Vol1 2018 Geography Question 50. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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