By definition we have that the density is given by:

Where,
M: mass of the sample
V: volume occupied by the sample
Therefore, substituting values in the given equation we have:


Answer:
the density of a sample of gas with a mass of 30 g and a volume of 7500 cm3 is:

The child on a swing can be modeled as a simple pendulum. The period of a simple pendulum is given by
An exfoliation dome is a geological structure wherein it is primarily when the overburden of a surface gets removed by erosion, thus leading to rock relaxation. In addition, the term would be best applied to the national landmark of Yosemite National Park wherein the place has one of the best waterfalls in California.