This depends on what type of cat you have. If you have a mouser or a barnyard cat they are obviously good at mousing. If you have a pampered, stuck-up cat that eats real meat and you prepare a meal for it like you do your family, then they are good at spending your money. If you have a fat cat then they are good at laying around and covering your carpet with their hair and smell. If you have a loving, well brushed, well trained house cat then this cat should be very friendly and a good lap-sitter. All cats should love their masters--people--, or maybe all people should love their masters -- cats -- , I'm not sure which it is.
they are useful for eating mice
They are for cuddling.
Yes.
pets :)
yes, cats gets or uses energy because it is a living (biotic) thing. They can get it from the food or the sun,
It uses DC current.
layers cats dogs
they will eat pesky mice silly
voltage can carry current a further distance.
By people
A meowspaper?
cats
Electricity
to conduct the current
to measure current in a circuit
In the current time XD