What work is needed to lift a 200 N box 2.0 meters up?
(A) 400 J (B) 400 N (C) 100 J (D) 100 N

Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.

**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

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?