Which waves require a material medium for transmission? a.) light waves b.) radio waves c.) sound waves d.) microwaves

Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

What is the length x of the side of the triangle below? (hint: use the cosine function)

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?