Two similar metal containers, P and Q, each contain water at 90°C. Both containers are the same size and both are sealed.
The water in container P cools more quickly than the water in container Q.
Which statement is correct?
1 )
P contains more water than Q.
2 )
P has a shinier surface than Q.
P is painted a darker colour than Q.
4 )
P is surrounded by a vacuum and Q is surrounded by air.
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