Question

Mercury and Alcohol are two common liquids used in thermometers.

The boiling point of MERCURY is 357 °C, while its freezing point is -39 °C
For ALCOHOL, the boiling point is 78 °C and the freezing point is -80 °C

It is required in a laboratory to make measurements which are in the region of -60 °C. Which type of thermometer would be more suitable?
1 A MERCURY thermometer since the freezing point of mercury is more than -60 °C.
2 A MERCURY thermometer since the boiling point of mercury is as high as 357 °C.
3 An ALCOHOL thermometer since the boiling point of alcohol is lower at 78 °C.
4 An ALCOHOL thermometer since the freezing point of alcohol is lower than -60 °C.

Answer 1

Answer:

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Answer 2

Answer:

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