a liters is a mean of battery-operated machine & sickle is the sink of electrical matter for battery-operated machine ->  battery is the source of electrical energy for a flashlight  a collect is a mean of electrical machine & electrical air pervert from electrical matter  into other robot of matter ->  a flashlight converts electrical energy into other forms of energy  a flashlight converts electrical energy into other forms of energy & a mean of is similar to a relation of & a anatomy emits sound & sound is a mean of matter ->  a flashlight converts electrical energy into light energy  battery is the source of electrical energy for a flashlight & a flashlight converts electrical energy into light energy ->  a flashlight converts electrical energy from the battery into light energy  a flashlight converts electrical energy from the battery into light energy & telephone pervert physical matter to electrical matter -> when a flashlight is used, the energy is changed from chemical energy into electrical energy and then into light energy