A cylinder can release 340 litres of oxygen at a pressure of 101000pa .the inside volume of thbe cylinder is 2.5 litres. using the formula p2=p1 v1 divided by v2 calculate the pressure of the oxygen in the cylinder before the gas is released

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

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.