HELP ASAP PLSSS Your class is designing electromagnets. Available materials include: various batteries, different sizes of iron nails, and a farge roll
of copper wire. Your group built an electromagnet and collected the following results. What can you infer from their resties?
A) 20 coils is 4 times stronger than 5 coils.

B) Increasing the coils of wire increased the strength of the magnet.
Increasing the coils of wire decreased the strength of the magnet.

C) increasing the coils of wire decreased the strength of the magnet.

D)For every 5 coils of wire added to the electromagnet, the strength of the
magnet doubled

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.