Answer:
Mono-chromatic, Poly-chromatic. When a wave moves from one medium into another at an angle other than 90 degrees the wave will change direction and continue to follow a new straight-line path
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Answer:
D. 214 kPa
Explanation:
The absolute pressure is given by:
where
p is the absolute pressure
is the atmospheric pressure
is the gauge pressure
In this problem, we have
So, the atmospheric pressure is
Answer: the average density (in kg/m3) of the log is 400 kg/m³
Explanation:
Given that;
a log with uniform-diameter floats with 60.0% of its length above water.
from the Archimedes principle formula;
friction submerged = Average density of object / density of fluid. --- equ 1
We know that; density of water = 1000 kg/m³
now the log floats with 60.0% of its length above water
so submerged fraction is 100% - 60% = 40% = 0.40
from our equation;
friction submerged = Average density of object / density of fluid
we substitute
0.40 = Average density of object / 1000 kg/m³
Average density of object = 0.40 × 1000
Average density of object = 400 kg/m³
Therefore; the average density (in kg/m3) of the log is 400 kg/m³
