4. A toy train engine rest motionless on a track One student begins pushing the engine to the right with a force of 2 N. At the same time, another student begins pushing the engine to the left
with a force of 5 N. What is the net force acting on the train and which direction will it move?
Draw it out below! *Use a box for the train and arrows for force

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

it is reliable if two scientists recorded it