What device produces light by running an electric current through gas?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?