How many decades are in 6.02 x 10^23 seconds

6.02 x 10²³ seconds ≈ 1.909 x 10¹⁵ decades

Explanation:

Second is the SI unit of time, which is denoted by the symbol s. In one minute there are 60 seconds.

So, in one hour there are 60 mins = 60 × 60 seconds = 3600 seconds.

In one day there are 24 hours = 24 × 60 minutes = 24 × 60 × 60 seconds = 86,400 seconds.

In one year there are approximately 365 days = 365 × 24 hours = 365 × 24 × 60 minutes = 365 × 24 × 60 × 60 seconds = 31536000 seconds.

Since, a decade is defined as the period of ten years.

So, a decade = 10 years = 10 × 365 days = 10 × 365 × 24 hours = 10 × 365 × 24 × 60 minutes = 10 × 365 × 24 × 60 × 60 seconds = 315360000 seconds.

Since, 315360000 seconds = 1 decade

Therefore, 6.02 x 10²³ seconds = 6.02 x 10²³ seconds ÷ 315360000 seconds ≈ 1.909 x 10⁻⁸ x 10²³ = 1.909 x 10¹⁵ decades

the correct answer is answer a. a mixture

no other options make sense

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  - sprinkles

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.