At a festival, spherical balloons with a radius of

110.cm

are to be inflated with hot air and released. the air at the festival will have a temperature of

25°c

and must be heated to

100°c

to make the balloons float.

3.00kg

of butane

c4h10

fuel are available to be burned to heat the air. calculate the maximum number of balloons that can be inflated with hot air.

here are some data you may find useful:

specific heat capacity of air:

1.009j·g°c

density of air at

100°c

:

0.946kgm3

density of butane at

100°c

:

1.898kgm3

formation enthalpy of butane at

25°c

:

a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity

explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

it's all four options.

it's c (engineer's do their work with mechanical stuff not on any living being)