passwella.
Menu

JAMB Physics 2006 Question 20

Question 20

Measurement and Units

The correct unit of energy density is

  1. A.kg m−3s−2.
  2. B.kg m−1s−2.
  3. C.kg m2s−2.
  4. D.kg m2s−2.
Show the answer and explanation

Answer: B (kg m−1s−2.)

Explanation

Energy density is energy per unit volume: J m−3 = (kg m2 s−2) ÷ m3 = kg m−1 s−2.