There is a difference between iron and copper. What can you conclude from this with regard to the speed of sound through
metals?​

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.

Work = force × a. work b. energy c. distance d. momentum

What are the north and south poles of a solenoid change with?