1. For each of the following statements determine whether it is true, false, or

Question

1. For each of the following statements determine whether it is true, false, or unable to tell.

a) Energy's transferred from the sun to earth via conduction.

b) When water is poured into ice, all the ice will melt. Assume no heat is transferred to the surroundings

c) You can safey touch a piece of Aluminum foil just taken out of a hot oven because it has low heat capacity.

d) The main reason a double pane window reduces heat loss is because of the gas between the two panes.

e) A coat keeps you warm in winter because it produces it heat as you move around (ie. friction)

Explanation / Answer

a) Space is a vaccum. Energy transferred from sun to the earth is radiation, is process of of transfer of heat in the absences of material of medium. Therefore the given statement is False.

b) It is not possible to tell always, all ice wiil melt completely, and this depends on initial temperature of ice or water.

Therefore the given statement is unable to tell

c)Heat capacity of Aluminium is low.You can safey touch a piece of Aluminum foil just taken out of a hot oven.

Therefore the given statement is true.

d) In window pane , there is an air trap between two layers of glass to reduce the heat loss.Therefore the given statement is true.

e) Coat keeps warm in winter because the air layers trap betweeen them is an insulator, Therefore the given statement is true.

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