Igneous Rock is formed when a magma cools underground and crystallizes or when it erupts unto the surface of the ground, cools and crystallizes. Magma that erupts onto the surface is called lava. When magma cools slowly underground the crystals are large enough to see.
Readings for compression tests usually vary between 175 to 250 PSI (Pounds per Square Inch). A higher reading generally indicates better engine performance; however you should check your vehicle manual to find out what the ideal reading should be for your vehicle.
The rate for a single rescuer would be around 80 compressions. For two person rescuer then it should be around 100 compressions per minute. At a rate of 30 compressions to 2 breaths you would get approximately 80 compressions in the minute this is because the interruption of breaths.If you chose anything lower then your not getting enough compressions in or breath, any faster your would (the rescuer) become dizzy and faint.t a rate of 30 compressions to 2 breaths you would get approximately 80 compressions in the minute this is because the interruption of breaths. If you chose anything lower then your not getting enough compressions in or breath, any faster your would (the rescuer) become dizzy and faint.