Two books that changed the science of astronomy and the world nicholas copernicus isaac newton.

select the best answer from the choices provided.
a. the three laws of planetary motion, principia astronomica
b. de revolutionibus, principia mathematica
c. leviathan, principia mathematica
d. principia mathematica, leviathan

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

**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 hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?