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2 years ago

What are the function of mercury barometer

Physics

2 answers:

Orlov [11]2 years ago

3 0

Answer:

A mercury barometer is an instrument used to measure atmospheric pressure in a certain location and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.

Explanation:

olganol [36]2 years ago

3 0

Answer:

1. The density of mercury (=13.6×10 to power 3 kg /m) is greater than that of any other liquid so only 0.76m height of mercury column is needed to balance the normal atmospheric pressure. Use of other liquids require much longer tube .

2.The vapour pressure of mercury is negligible, and so the vacuum does not affect the barometric height.

3.The mercury neither wets nor sticks to the glass tube therefore gives accurate reading.

4.It can easily be obtained in a pure taste .

5. Mercury has a opaque and shinning surface therefore can me easily seen while taking the reading.

Explanation:

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Svetlanka [38]

Answer:

<em>The estimated age of the universe is</em> $4.42*10^{17}\ seconds$

Explanation:

<u>Time Units Conversion</u>

Sometimes we need to express magnitudes in different units, depending on the specific situation handled in the question or problem at hand. Magnitudes like length, time, mass, temperature, pressure, etc., can be expressed in several different units.

The most common units for time are years, months, days, hours, minutes, and seconds. There are 3,600 seconds in one hour and 24 hours in one day.

We are given the estimated age of the universe as 14 billion solar years. If one solar year is 365.25 days long, then the age, expressed in days is

14,000,000,000 * 365.25 days

Some quantities need to be expressed in scientific notation. This is the case since the numbers are too high

$14,000,000,000 * 365.25 = 5.1135*10^{12}\ days$

There are 24*3600=86400 seconds in one day, so

$5.1135*10^{12}\ days=5.1135*10^{12} * 86400 =4.42*10^{17}\ seconds$

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3 years ago

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A student walks a distance of 3 km in 20 minutes calculate his average speed

serg [7]

Answer:

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Explanation:

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x = 3 km/20 minutes

x = 0.15

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x = 3000 m/1200 s

x = 2.5

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3 years ago

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2 years ago

Three point charges lie in a straight line along the y-axis. a charge of q1 = -9.10 µc is at y = 6.30 m, and a charge of q2 = -7

inysia [295]

Answer:

Electric field E = kQ/r^2

Distance between charges = 6.30 - (-4.40) = 10.70m

Say the neutral point, P, is a distance d from q1. This means it is a distance (10.70 - d) from q2.

Field from q1 at P = k(-9.50x^10^-6) / d^2

Field from q2 at P = k(-8.40x^10^-6) / (10.70-d)^2

These fields are in opposite directions and are equal magnitudes if the resultant field = 0

k(-9.50x^10^-6) / d^2 = k(-8.40x^10^-6) / (10.70-d)^2

9.50 / d^2 =8.40 / (10.70-d)^2

d^2 / (10.70-d)^2 = 9.50/8.40 = 1.131

d/(10.70-d) = sqrt(1.1331) = 1.063

d = 1.063 ((10.70-d)

= 10.63 - 1.063d

2.063d = 10.63

d = 5.15m

The y coordinate where field is zero is 6.30 - 5.15 = 1.15m

Explanation:

4 0

3 years ago

What are the function of mercury barometer ​

What are the function of mercury barometer