Astudent took notes in class. - uses high frequency sound waves - creates images from echoes - has many applications - medical - pregnancy - kidney stones - cancer - injury identification - other - cleaning - identification of objects - breakdown of bacteria - production which would be the best title for these notes?

100mg magnesium reacts with 20ml of 1.0m hcl

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

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.