If velocity is positive, which would most likely yield a negative acceleration
a final velocity that is faster than an initial velocity.
o atime that is less than a half hour.
an initial velocity that is faster than a final velocity.
a time that is greater than a half hour.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

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.

i'm on my way to history not a mistory.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.