What is most likely the mass of sirius?

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Organisms that successfully adapt will leave to grownone of the above

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes