2points
which of these is a cost of mining aluminum from new bauxite deposits?
a. transporting a heavy metal
o
o
o
o
b. producing toxic "salt cake" westes
c. disrupting tropical rain forest animals
d. preserving remaining aluminum reserves

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward

An atom that has gained or lost electrons is called an _