I hope that the attachment helps you..
Anything less dense than water will float, like oil. Anything more dense than water will sink, like rock.
Work done by a given force is given by

here on sled two forces will do work
1. Applied force by Max
2. Frictional force due to ground
Now by force diagram of sled we can see the angle of force and displacement
work done by Max = 

Now similarly work done by frictional force



Now total work done on sled


A theromometer is the increase or decrease of earths atmospheric temperture, thats how you would measure the temperture of the air around you.