could be a broken engine mount.
It is idling. This is hard for an engine to do smoothly.
thermal energy
One of the main causes of feeling a vibration in the gas pedal is engine vibration. The vibration from the engine causes the accelerator cable or linkage to vibrate and the vibration can be felt in the gas pedal. Check with a mechanic to be sure.
A 1994 Corolla engine may vibrate if the motor mounts need to be replaced. The motor mounts can be purchased at any auto parts store.
check your engine mounts..I am not sure where they are but if you can move the engine with a prybar you need new mounts..they arent to expensive
Heat!
Heat energy from the source causes the particles to oscillate (vibrate) this chains and causes neighbouring particles to vibrate.
No, they do vibrate to a degree as they are generally mounted to the engine and it vibrates but it should not vibrate due to its operation.
Mechanical Waves
Thermal energy causes particles to vibrate. When thermal energy is transferred to an object, its particles gain kinetic energy, causing them to move and vibrate.
they vibrate..