Alight ray strikes a plane mirror at an angle of 20 degrees to the normal. what is the angle of the reflected light ray to the normal?

40 degrees
70 degrees
0 degrees
20 degrees

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (