Does the law of conservation of mass apply to physical changes? How could you test this for melting ice?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z