The magnetic field at the center of a 1.0-cm-diameter loop is 2.5 mT. a. What is the current in the loop? b. A long straight wire carries the same current you found in part a. At what distance from the wire is the magnetic field 2.5 mT?

An unknown substance has a melting point of 1064 ∘c, is insoluble in water, conducts electricity as a solid, and is hard. given these properties, which of the following are possible identities for the unknown substance? check all that apply. view available hint(s) check all that apply. sio2 f2 au kbr

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

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