Explain the energy, temperature, and mass changes that occur when
a- an ice at 0°c, starts to melt (3 marks)
b- a saucepan filled with soup at 15°c is heated on a gas hob (3 marks)
c- boiling water from a kettle at 100°c turns to water vapour

a and b sometimes have a positive value

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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