Class X

Error due to manually stopping a stopwatch is termed as
  1. Climax error
  2. Human reaction error
  3. Human reaction time
  4. Ratability error
Specific latent heat of hot chocolate is 60 J kg-1 and its latent heat is 3 J, mass of hot chocolate would be
  1. 180 J
  2. 20 J
  3. 63 J
  4. 57 J
Formula for gravitational potential energy is
  1. Ep = mg/h, where m is mass, g is gravitational pull and is height
  2. Ep = m/gh, where m is mass, g is gravitational pull and is height
  3. Ep = mgh, where m is mass, g is gravitational pull and is height
  4. Ep = gh/m, where m is mass, g is gravitational pull and is height
 Volume of mercury is 0.4 m³ and mass is 5440 kg, density of mercury is
  1. 1360 kg m-3
  2. 136 kg m-3
  3. 13600 kg m-3
  4. 13.6 kg m-3
Standard symbol for heat capacity is
  1. H
  2. C
  3. Q
  4. E
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