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how is obsidian formed and where is it

Obsidian is a type of volcanic rock, and so it is typically found near volcanoes. It is formed when lava (molten rock) is cooled very rapidly. An example of this rapid cooling is when lava moves into a body of water, which cools it and turns it into obsidian very quickly.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.