Which of the following can-not be separated by physical means?
select one:
a. mixtures
b. solutions
c. elements

Enzyme speed up chemical reaction are which type of marcomolecule? a.carbohhydrates b.protiens c.lipids d.nucleic acids

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?