help fast please Electrolysis (the breaking by electricity) can be used to separate this substance. A mixture B. compound O pure substance D. element..

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?