Polar Covalent: One dog slightly stranger than the other.

Meaning

Well this could mean many things. It depends how you look at it. So when I first read this I thought mutation. You should know the this. But for those of you who don´t here is a summary of it. Mutation is when the natural form turns how the wrong way. If you have any questions want me to expain things better just comment and ask me, okay. I hope I helped. And if you are willing mark me brainliest  

Explanation:

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.

the answer is the first option

explanation:

just googled it m8. not that hard

lol