Solve for A in terms of B, C, and D - BA=DE/C ; B/E=1/2 D I can't find a crash course for doing this on the internet, so if anyone could either explain how to do this and/or lead me to a tutorial that would be very nice

Why there is no inductive reactance in dc circuits

**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

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n