Which is the basis of the major rock classifications?

A. degree of glassiness

B. the method of rock formation

C. rate of conglomeration

D. the number of foliated layers

Why is the mechanical advantage of using a single pulley always 1? Assume there's no friction.

For all values of x, y, and z, which expression is equivalent to 5xy. 5z? 5 (x + y + 2) 10xyz 25xyz 25 + x + y + z

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.

Edward travels 150 kilometers due west and then 200 kilometers in a direction 60° north of west. What is his displacement in the westerly direction

A boy pulls a wagon with a force of 6N east as another boy pushes it with a force of 4N east. What is the net force

How many earth years does it take mars to orbit the sun

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are