What major advantage did Britain have over China which could be the reason the Industrial Revolution started there?

Britain had the advantage of an absence of internal trade barriers. This means that products and goods could move from one area of Britain to another, without being taxed. This encouraged internal British trade. In addition, the British government allowed its population to relocate to different towns.

1.94 atm is the pressure at underwater site.

19.4 meters is the depth of the underwater site.

Explanation:

Pressure of the balloon at the dept at which scuba diver is working:

=

Volume of the balloon at the dept at which scuba diver is working:

=

Pressure of the balloon at the surface:

=

Volume of the balloon at the dept at which scuba diver is working:

=

Using Boyle's law:

(at constant temperature)

1.94 atm is the pressure at underwater site.

Pressure increases by exactly 1.0 atm for every 10 m depth.

Pressure increase for every 1 unit increase in depth=

Depth at which pressure is 1.94 atm  = h

19.4 meters is the depth of the underwater site.