Which phase of matter has a fixed volume but variable shape

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

‘which reaction would most likely require the use of an inert electrode?