B. picking up a box off the floor
PART A)
Heat released by iron = heat gain by water
now we have
PART B)
When endothermic changes takes place in the system then system absorbs the energy from its surrounding and keeps on cooling down
Due to this the observer will feel the cool down of the surface temperature and conclude that it is an endothermic reaction
PART C)
When a substance freezes its temperature do not change but if we will check the potential energy of molecules we can conclude that the system released its energy which is known as latent heat.
This will lead to the increase in its potential energy
And due to this decrease in latent heat the substance will freeze
Answer:
D. Alaska is in the half of Earth that's illuminated longer by sunlight.
Explanation:
Alaska is closer to the north poll than Florida causing longer day during the summer because Alaska is facing the sun (roughly) 20 hours out of the day.