Which is NOT a challenge for spacecraft exploring the outer Solar System.

ong communication time

lack of sunlight for solar panels

long flight times

high temperatures

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Moving down the ramp from 6 meters to

Which is the most likely reason the writer of the play pygmalion chose to change the character of galatea from a statue to working-class woman?