23. (a) Fig. 23.1 shows a coil ABCD with two turns. The coil is in a magnetic field
B
N
S
D
Fig. 23.1
When there is a current in the coil, the coil experiences a turning effect
(1) Explain why there is a turning effect
(ii) The value of the current is 3A. Place one tick in each column of the
table to indicate how the turning effect changes with the change
described​

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

This is the substance(s) formed in a chemical reaction.