I think the kind of energy you are looking for is mechanical energy.
mechanical energy
electric energy
A vacuum uses the energy electricity
The pencil uses Thermal energy.
It depends on the kind of memory card the keyboard uses. What kind of keyboard, what model, make, etc.? You might want to read the manual.
The best keyboard to use with a laptop is the one that comes with your laptop, baring that there are a wide array of fold up or wireless keyboard.
depends on what kind or dell it is
standard keyboard,enhanced keyboard
I think the kind of energy you are looking for is mechanical energy.
Radios use eletrical energy
Magnetic energy
mechanical energy
kinetic energy
potential energy
Electrical energy.
electric energy