Electricity can be used to move magnets, which are then used to do work. which device uses electricity in this way
a. power plant
b. electric resistor
c. electric generator
d. electric motor

The correct answer is "electric motor".

Explanation:

Electric motor is the device which converts the electrical energy into the mechanical energy.

When the current is flowing through the wire then there will be magnetic field around the wire. The current flowing wire can be used to move the magnets.

Electricity can be used to move magnet which are then used to work. The electric motor uses electricity in this way. It generates the magnetic field with the electric current through the coil. This magnetic field moves the magnet that runs the motor.

Therefore, the correct option is (D).

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.