If my math is right its A) 7
because 189 divided by 27 is 7
Answer:
c.Law
Explanation:
i think you must learn and write however good luck
T
Answer:
the velocity is a second final to initial velocity of 39
Answer:
0.0000167283525619 N
Explanation:
= Density of silk = 1300 kg/m³
d = Diameter = 0.002 mm
r = Radius = 0.001 mm
l = Length = 16 cm
f = Frequency = 200 Hz
Mass of the string is

Frequency is given by

The tension on the string is 0.0000167283525619 N
Answer:
1.33
Explanation:
speed of light in vacuum, c = 3 x 10^8 m/s
speed of light in medium, v = 2.26 x 10^8 m/s
The refractive index of the medium is given by
μ = speed of light in vacuum / speed of light in medium
μ = (3 x 10^8) / (2.26 x 10^8)
μ = 1.33