A15.4 cm diameter circular loop is made up of 20 loops of copper wire that has a measured resistance of 2.7 m. at what rate must the magnetic field change if an induced current of 15 a is needed in the loop? o 057 t/s o 1.7 t/s o 0.19 t/s

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.