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Unilorin Post-UTME Physics 2021 (Model questions) Question 2

Question 2

Measurement and Units

Which of the following physical quantities is correctly paired with its corresponding SI. unit?

  1. A.Density [kgm3]
  2. B.Power [Js−1]
  3. C.Specific latent heat [J kg−1 K−1]
  4. D.Pressure [N m−1]
Show the answer and explanation

Answer: B (Power [Js−1])

Explanation

Power is energy per second, J s−1 (the watt). Density is kg m−3, latent heat J kg−1 and pressure N m−2.