A physics book has a mass of 2 kg. About how much does it weigh? (use g = 10 m/s^2) A. 2.0 N
B. 20 N
C. 12 N
D. 0.2 N

Which would not reduce the amount of green house gasses in the air

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

**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