Class X

Mass of wood is 2600 kg and volume is 5.2 m³, its density is
  1. 500 kg m-3
  2. 50 kg m-3
  3. 5000 kg m-3
  4. 2 × 10-3
Adding of two vectors to get a single vector is termed as
  1. Final vector
  2. Resultant vector
  3. Dominant vector
  4. Recessive vector
To convert density of kg m-3 into g cm-3, we divide quantities with
  1. 100
  2. 10
  3. 400
  4. 1000
 A pendulum bob moves at a speed of 2 m s-1 and mass of 0.5 kg, its Ek would be
  1. 1 J
  2. 0.25 J
  3. 0.5 J
  4. 2 J
An iron wire resists 850 Ω at ice point and 860 Ω at steam point, and resistance of wire is 853 Ω room temperature would be
  1. 10 °C
  2. 20 °C
  3. 30 °C
  4. 40 °C
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