Who wants to talk it is 5:53 am my time

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

As water is cooled from 4 c to 0 c its density