A man stands by a train track to watch the train car go by. Inside, a man walks through the train car eating a hot dog (the hot dog is moving 1 m/s towards his mouth). Determine the hot dog's velocity with respect to the man standing still outside of the train car.

Idon’t quite understand this problem

**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

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?