What is momentum. i need help please help me. be a good friend

Compare and contrast physical changes with chemical changes.

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

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