Fuses and circuit breakers are connected in with the load and all other components in the circuit.

series

Explanation:

the fuse and circuit breakers  are protective devices meant to protect all loads and components in a circuit, therefore current has to pass trough them before getting to the loads and components and hence they are connected in series. If current that comes trough the fuse is above its required rating, the fuse will cut and if its the breaker it will trip off, hence preventing flow of current and damage to other loads and circuitry.    

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.