Meaning of My grandfather used to have a biro for writing 3)We looked for bibiiographies in the library.
4)There are plenty of trees in the forest.
5)My aunt is a theater actress.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.