| Sr No |
Question |
Answer |
Remarks |
| 2 |
One decameter is |
one by tenth of a meter |
Centimetrer and milimeter are very commonly used in our day to day life. But decameter is one tenth of a meter not very commonly used. Cube of a decameter is a litre which is commonly used for measurement of volume, liaquid, petrol, milk etc. |
|
| 3 |
micrometer is |
one millionth of a meter |
One millionth of a meter is micrometer and one billionth of a meter is nanometer. The diameter of hair is in micrometer and is around 170 micrometer whereas organism cell are measurement in nanometer. Micrometers are used for measurement of dimensions size like hair and microscope for nano scale. |
|
| 4 |
What is done in a material testing laboratory? |
all of them |
The material we use in our daily life undergoes testing at the manufacturing plan. It is done to ensure quality of material with refernce to the standards fixed for that material. |
|
| 5 |
Why do we measure weight of a birthday cake in pound? |
None of the above |
There is not historical reason available. It is believed that Imperial measurement sytem was followed in UK and many parts of the Europe in which unit of measurement was pound and thus it became a household name to be followed as a convention. There are many conventions in measurement and continued to be followed. |
|
| 6 |
Megatonne unit is equal to |
one billion Kg |
One shoud remember that for measurement of large weights we use the unit Metric Tonne i.e. 1000 Kg and there is another unit commonly used Quintal i.e. 100 Kg. For very large measurements such as explosion we use megatonne |
|
| 7 |
What is precision measurement? |
measurment taken many times unless the repeated readings are same |
In order to avoid error in measurment, measurements are repeated and to check that the measurement stays the same. |
|
| 8 |
Laboratory scale is having temperature range of |
-10 to 110 degree centigrade |
The scale of centigrade measurment is having end boundaries of zero i.e. melting point of ice and 100 i.e. boiling point of water and divided in 100 units. The laboratory scale is extended by 10 units at each end of the measurment |
|
| 9 |
What is absolute zero temperature? |
-273 |
Absolute temperature is the limit to which lowest of the temperature achieved. The scientist by name Kelvin. On the absolute temperature scale, which is used by physicists and is also called the Kelvin scale, it is not possible to go below zero – at least not in the sense of getting colder than zero kelvin. … At zero kelvin (minus 273 degrees Celsius) the particles stop moving and all disorder disappears. |
|
| 10 |
Why mercury is used in thermometer? |
due its expansion |
Mercury expansion with temperature is uniform and rise in the coloum uniformly to indicate the rising temperature |
|
| 11 |
Which thermometer is used in polar region? |
Alcohol |
Alcohol thermometer is used since its freezing point is -112 degree whereas mercury is -39 degree. Alchohol thermometer is more reliable than electronic thermometer. |
|
| 12 |
At what temperature air will beocme liquid? |
about minus 200 degree |
Air liquifies at around minus 180 degree |
|
| 13 |
Which country uses Farenheit for measurement of temperature? |
USA |
USA uses Farenheit . Also Liberia and Cayman island. |
|
| 14 |
What is your height? |
What is your height? |
Measure your height and answer |
|
| 15 |
What is your weight wearing shoes? |
What is your weight wearing shoes? |
Measure your weight and answer |
|
| 16 |
UK follows which system of measurement? |
System International Unit |
UK uses SI unit. British imperial system was followed before SI. FPS is in imperial System followed in USA |
|
| 17 |
What are standard units in SI unit? |
MKS |
M-Meter, K-Kilogram and Second |
|
| 18 |
What happens to the atoms of the element at zero Kelvin |
starts moving fast to gain energy |
At zero K, the kinetry energy of atoms come to zero and stops moving. |
|
| 19 |
Why do you see light earlier than sound in a thunderstorm? |
because speed of light is more than sound |
The speed of light of 1.08 billion Km/hr. The speed of sound is only 1236 Km/hr. |
|
| 20 |
What is supersonic speed? |
speed higher than speed of sound |
The speed which is higehr than sound is called supersonic speed. |
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