Describe a procedure you could use to separate the components of a mixture of sand, gravel, salt, and iron fillings. identify which component(s) would be separate at each step, and why.

Which metal exist in liquid state and can be cut with knife ?

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

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it