Which technological advances made world war i different from past wars? select four answers. Aircraftpoison guns.

It's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)?             a.  10 to 50 psi    b.  40 to 140 psi  c.  210 to 290 psi  d.  at least 350 psi

Explain how earth is like a giant bar magnet. how is our magnetic field made?

Asking questions when something is unclear is part of?