Asystem absorbs 191 kj of heat and the surroundings do 120 kj of work on the system. what is the change in internal energy of the system?

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

What is the maximum number of electrons that an atomic orbital can contain?

What’s the theoretical yield of solid lead