Question 9

 

(a)        Give three examples of thermometric properties

(b)        A quantity of water of mass 20 g at -5oC was gradually heated until it finally boils.
(i)         Sketch a graph of density against temperature for the heating process.
(ii)        Calculate the minimum energy required to melt the ice.
[ specific heat capacity of ice = 2.1 x 103 J kg-1,Specific latent heat of fusion of ice = 3.2 x 105 J kg-1] 

(c)        Define each of the following terms associated with a simple machine:
(i)         load;
(ii)        velocity.

(d)       State whether or not velocity ratio is affected by frictional forces and give the reason for your answer.

(a)        Give three examples of thermometric properties.

(b)     A quantity of water of mass 20 g at -50C was gradually heated until finally boils.

                        (i)         Sketch a graph of density against temperature for the heating process.

                        (ii)        Calculate the minimum energy required to melt the ice.
[ specify heat capacity of ice = 2.1 x 103 J kg-1 K-1, Specify latent heat of fusion of ice = 3.2 x 105 J kg-1]

(c)        Define each of the following terms associated with a simple machine;

                        (i)         load;

                        (ii)        velocity ratio.
(d)        State whether or not velocity ratio is affected by frictional forces and give the reason for your answer.