2. Using only a straightedge and a compass, construct the image of AEFG after a rotation by 180° about point K shown. Leave all
construction marks. Mark the image AE'F'G'. E k K F G
1 answer:
When a point is rotated, it must be rotated around a point.
See attachment for the image of the rotation about point K
The given parameters are:
The angle of rotation is
The above angle of rotation means that:
The translated triangle will be 180 degrees from about point K.
It also means that:
and
will be equidistant from point K
See attached image for
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Answer:
correct option is C) 2.8
Step-by-step explanation:
given data
string vibrates form = 8 loops
in water loop formed = 10 loops
solution
we consider mass of stone = m
string length = l
frequency of tuning = f
volume = v
density of stone =
case (1)
when 8 loop form with 2 adjacent node is
so here
..............1
and we know velocity is express as
velocity = frequency × wavelength .....................2
= f ×
here tension = mg
so
= f ×
..........................3
and
case (2)
when 8 loop form with 2 adjacent node is
..............4
when block is immersed
equilibrium eq will be
Tenion + force of buoyancy = mg
T + v × × g = mg
and
T = v × - v ×
× g
from equation 2
f × = f ×
.......................5
now we divide eq 5 by the eq 3
solve irt we get
so
relative density
relative density = 2.78 ≈ 2.8
so correct option is C) 2.8