For 25 points please help You need to join three single-phase transformers together to create a three-phase transformer system that can step up the incoming voltage from 240 to 480 VAC. To accomplish
this task, in which of the following arrangements should the three single-phase transformers be connected?
A. Y-delta
B. Delta-Y
C. Y-Y
D. Delta-delta

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Acar travels 40m in 8 seconds find the car speed