The density 400cm3 of palm oil was 0.9gcm-3 before frying. If the density of the oil was 0.6gm-3 after frying,assuming no loss of oil due to spilling, its new volume was
Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?
A.
the polished vessel will cool faster because a polished surface is a good radiator
B.
the polished vessel will cool faster because it will absorbe less heat from the room
C.
the black vessel will cool faster because it is a better conductor of heat
D.
the polished vesselwill cool faster because it reflects heat better
E.
the black vessel will cool faster because a black surface radiates heat faster than a polished one
