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Question Detail
What is the range of mercury thermometer ?
- 0 degree Celsius to 350 degree Celsius
- -10 degree Celsius to 350 degree Celsius
- -20 degree Celsius to 350 degree Celsius
- -30 degree Celsius to 350 degree Celsius
Answer: Option D
1. K. Macmillan invented
- Bicycle
- Barometer
- Calculating Machine
- Centigrade Scale
Answer: Option A
Explanation:
K. Macmillan of Scotland invented Bicycle in 1839.
Barometer was invented by E. Torricelli of Italy in 1644.
Calculating Machine was invented by Pascal of France in 1642.
Centigrade Scale was invented by A. Celsius of France in 1742.
2. What is unit of Viscosity ?
- coulomb
- newton second per square meter
- watt per meter per degree celcius
- joule per kilogram per Kelvin
Answer: Option B
Explanation:
coulomb is unit of Electric Charge,
watt per meter per degree celcius is unit of Thermal Conductivity,
joule per kilogram per Kelvin is unit of Specific Heat capacity.
3. Siphon will fail to work if
- both its limbs are of unequal length
- the temperature of the liquids in the two vessels are the same
- the level of the liquid in the two vessels are at the same height
- the densities of the liquid in the two vessels are equal
Answer: Option C
4. Force of attraction between the molecules of different substances is called
- Surface tension
- Cohensive force
- Adhesive force
- None of above
Answer: Option C
Explanation:
Cohensive force - Force of attraction between the molecules of same substance is called Cohensive force.
5. Which instrument is used to measure curvature of spherical objects ?
- Spectroscope
- Spherometer
- Spectrometer
- Sextant
Answer: Option B
Explanation:
Spectroscope - used to record spectra,
Spectrometer - used to measure the position of spectral lines,
Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude. what you thought :)
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