Aclever engineer designs a "sprong" that obeys the force law fx=-q(x-xe )3, where xe is the equilibrium position of the end of the sprong and q is the sprong constant. for simplicity well let xe=0 then fx=-qx3.
a) what are the units of q?
b) draw a graph of fx vs. x.
c) find an expression for the potential energy of a stretched or compressed spring.
d) a sprong-loaded toy gun shoots a 20g plastic ball. what is the launch speed if the spring constant is 40,000, with the units you found in part a, and the spring is compressed 10 cm? assume the barrel is frictonless.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

where’s the list ? the question is incomplete

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.