What would be the final temperature if you mixed a liter of 40C water with 2 liters of 20C water?

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?