6. the four main systems of the earth are
a. geology, meteorology, oceanography, and chemistry.
b. geosphere, atmosphere, hydrosphere, and aerosphere.
c. aromatherapy, biology, chemistry, and physical properties.
d. geosphere, atmosphere, hydrosphere, and biosphere.

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

The movement of electrons between atoms is called an

If the area of a square has increased by a factor of 16, by how much has each side increased?