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Both evaporation and boiling are a process where a liquid change state into a gas.

Boiling happens to all of a liquid at once and occurs only when a liquid is heated to one specific temperature, it...

Velocity and speed and vector and scalar quanities respectively. Vector quantities have both direction and magnitude (size), whilst scalars only have magnitiude. It is important to distinguish between the...

Change in velocity is 30m/s Acceleration is equal to the change in velocity / time taken a = 30/10 = 3m/s²  

a) energy transferred = mass.specific heat capacity.temperature change, or E = m.c.theta. c is provided at 4181 joules per kg. so E = 2.4181.(80-20) = 501720 joules

b) some water has evaporated off...

First, we need to recognise which equation to use. From the Physics Equation Sheet, we can see that the correct equation here is that dQ=mcdT, where dQ is the Energy transfer. Using this equation...