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Sidana [21]
2 years ago
8

A mercury thermometer is used to measure the temperature of boiling water but why do you think the mountainous travel to cold re

ason use alcohol thermometer​
Physics
1 answer:
melamori03 [73]2 years ago
7 0

Because mercury freeze in cold temperatures

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Estimate the number of times the earth will rotate on its axis during a human’s lifetime
Fudgin [204]

Here we have to calculate  the number of rotations made by earth around its own axis in the entire life time of a human being.

The average human life is 50 years .

Each year is 365.5 days

Hence 50 years =50 *365.5 days

                 =18,275 days

The earth rotates around its own axis in 23 hours 56 minutes and 4 second which is approximately equal to 24 hours or one days.

Hence one rotation takes one days.

⇒18,275 days =18,275 rotations

Hence the total number of rotations made by earth around its own axis in the life time of a average human life time will be 18,275 times

7 0
3 years ago
Four point charges have equal magnitudes. Three are positive, and one is negative, as the drawing shows. They are fixed in place
Semmy [17]

Answer:

Ans= 9

See attached picture for clearer solution.

Explanation:

The net electrostatic force acting on charge A = 2/ 2 + 2 /(2) 2 − 2 /(3) 2 = 2 / 2 (1 + 1/4 – 1/9 ) = 41/36 2/2 .  

The net electrostatic force acting on charge B = 2/2 + 2/(2)2 − 2/2 = 1/4 2/d2 .  

The net electrostatic force acting on charge C = 2/2 + 2/(2)2 + 2/2 = 2/2 (1 + 1 4 + 1) = 9/4 2/2 .  

The net electrostatic force acting on charge D = 2/2+ 2 /(2)2 + 2/(3)2 = 2 /2 (1 + 1/4 + 1/9 ) = 49/36 2/ 2 .  

The ratio of the largest to the smallest net force = 9/4*2/2  /  1/4 2/2 . = 9

5 0
3 years ago
A paper airplane moving 2.33 m/s has 0.161 J of KE. What is its mass? (Unit = kg)
LekaFEV [45]

The kinetic energy of an object is given by:

KE = 0.5mv²

KE = kinetic energy, m = mass, v = speed

Given values:

KE = 0.161J, v = 2.33m/s

Plug in and solve for m:

0.161 = 0.5m(2.33)²

m = 0.059kg

4 0
3 years ago
How to calculate the uncertainty ​
agasfer [191]

Answer:

If you're taking the power of a number with an uncertainty, you multiply the relative uncertainty by the number in the power.

Explanation:

5 0
3 years ago
True or false: points that lie on the same plane are Collinear
Svetllana [295]
False , because collinear points lie on a line not on a plane.
Coplanar points on the other hand, lie on a plane.
7 0
3 years ago
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