Question

how will you show that there is vacuum above the surface of mercury in a barometer...?how can we prove that it is vacuum?​

Answer 1

Answer:

Analogies

choose the pair of words which have a relationship between themselves similar to the relationship between the given pairs of words.

1. Cool:night::

a) yellow: colour

b) shade:sunshine

(c) fear: darkness

(d) warm:day

2. Paper:ream::

(a) newspaper: stand

(b) goose: geese

c) eggs: dozen

d) letter: message

3. Foil: toil::

(a) pale: tale

b) custom : costume

(c) habit: robot

(d) bee: bay

4. Sail:sale

a) cat:rat

b) blue:blew

c) car:rat

d) hug:huge

5. Sorrow: death

a) happiness:birth

b) laugh:cry

c) pain:cause

d)fear:hate

6. Request:command:

a) send:dispatch

b) come:go

c) arrive:reach

d) grammar:rules

7. Sniff:nose::

a) speak:language

b) sneeze: irritation

c) see:eyes

d) chorus:singer

Answer 2

Answer:

This empty space is called 'Torricellian vacuum'. This can be shown by tilting the tube till the mercury fills the tube completely. Again when the mercury column becomes stationary, the empty space is created above the mercury column.

hope this will help u ❤️