The mass of a solid cube is 635 g, and each edge has a length of 6.3 cm.
Find the density of the cube.
Answer in units of kg/m3
.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

2. how is heavy water different from normal water

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.