Answer: The balloon floats due to the difference in density
Explanation:
The air inside the balloon is warm as a result of it being heated. As warm air spreads out more, it has a lower density than cooler air.
A substance with a lower density rises over substances with higher densities as those sink lower. With the air in the balloon having a lower density, it will rise above the air outside which is colder and has a higher density.
Answer:
scale height = 19.80 km
Explanation:
given data
earth scale height = 8.6 km
atmospheric pressure = 10%
to find out
scale height
solution
we know that with the scale height we can find value of physical parameter that is change with height
and height is that value of pressure or density 
th of ground value
so we can say
= 10%
= 0.1
take log both side
t log(0.3678) = log 0.1
t = 2.3025
so
scale height for 10% is
scale height = 2.3025 × 8.6
scale height = 19.80 km
In recent decades, Australia has seen a shift towards higher temperatures and lower winter rainfall, which has had significant effects on many farmers. Despite these trends there remains much uncertainty over the long-run effects of climate change on farm businesses. This article presents ABARES latest modelling, examining the effects of recent and possible future changes in climate on the profitability of Australian farms. Productivity trends are also presented, showing how farm adaptation has helped to offset the effects of hotter and drier conditions to date.
I would say that the answer is C
