Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Figure 1 below shows a cross –section of a vacuum flask.
(i) Name the parts labeled
(ii) Explain how the heat losses are minimized when hot liquid is poured into the flask.
(iii) Boiling water is poured into two identical vacuum flasks A and B. flask A is partially filled while B is completely filled. Both are closed tightly. State with reasons the flask in which the water is likely to have a higher temperature eight hours later.