What is the mass of an object if it took 270 Joules of work to move it 15 meters? A. 1.8 kg
B. 18 kg
C. 4050 kg
D. 39,690 kg

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

**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

Which two particles are found in the center of an atom