Class X

Moment of force is a/an
  1. Scalar quantity
  2. Abbrevial quantity
  3. Base quantity
  4. Vector quantity
Reduction in risk of slipping while walking is a
  1. Positive effect of friction
  2. Negative effect of friction
  3. Neutral effect
  4. Combined effect (positive and negative both)
Air or water, better conductor of thermal energy is
  1. Air
  2. Water
  3. Both are equal
  4. Their betterment may vary
Thermal energy is transferred by
  1. Conduction
  2. Conduction and convection
  3. Conduction, convection and radiation
  4. Conduction and radiation
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