Why is an ionic solution a good conductor of electricity while a covalent solution is a poor conductor

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n