Which statement is true for both electromagnetic waves and mechanical waves?
A. They vibrate in the direction that is parallel to their direction of
travel
B. They transfer matter through empty space.
C. They carry energy over a distance,
D. They use matter to transmit the energy of a disturbance.

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?