Physical Science- Please help, mate.
1 answer:
a) Mercury (Hg) is the most dense
b) Titanium (Ti) is the least dense
c) We can tell it by comparing the slope of the lines
Explanation:
The density of an object is defined as:
where
m is the mass of the sample
V is the volume of the sample
In the graph in this problem, the mass of different samples of different materials is plotted against the volume of the samples. Therefore, we have:
- the mass on the y-axis
- the volume on the x-axis
This means that the slope of each curve is equal to the ratio between the value of the y-variable and the value of the x-variable, and therefore, it is equal to the ratio between mass and volume, which is the density:
So, we can compaare the density of the different materials by comparing the slopes of their lines. In particular:
- The line with greatest slope corresponds to the material with greatest density (Mercury)
- The line with the least slope corresponds to the material with least density (titanium)
Learn more about density:
#LearnwithBrainly
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Answer:
new atmospheric pressure is 0.9838 × Pa
Explanation:
given data
height = 21.6 mm = 0.0216 m
Normal atmospheric pressure = 1.013 ✕ 10^5 Pa
density of mercury = 13.6 g/cm³
to find out
atmospheric pressure
solution
we find first height of mercury when normal pressure that is
pressure p = ρ×g×h
put here value
1.013 × = 13.6 × 10³ × 9.81 × h
h = 0.759 m
so change in height Δh = 0.759 - 0.0216
new height H = 0.7374 m
so new pressure = ρ×g×H
put here value
new pressure = 13.6 × 10³ × 9.81 × 0.7374
atmospheric pressure = 98380.9584
so new atmospheric pressure is 0.9838 × Pa
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