Pascal knows that a falling body accelerates at a constant rate, and he also knows that the same is true of a ball rolling down a ramp, as in the figure. How could Pascal demonstrate that the force of gravity acting on an object is proportional to the mass of the object?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

An observation that requires measurement is called quantitative observable or qualitative

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.