Plastic wrap becomes electrically charged when pulled from its box. as a result, it is attracted to objects such as food containers. does the wrap stick better to plastic containers or to metal containers? discuss.

Explanation:

It sticks better to the plastic containers. We know that plastic is one among the good insulator, Hence as soon as the charged plastic wrap makes contact with the box, the charges will remain relatively fixed in particular location. Which will subsequently maintain the electrical attraction. When charged plastic wrap comes in contact with the metal, on the other hand, the charged plastic wrap will discharge through the metal since metal is a good conductor, causing it to lose its electrical properties.

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.

i'm assuming that the correct answer is indeed the first one/ "a"..