Explanation:
longitudinal wave .
they are composed of rarefaction and compression
there is change of pressure variations through medium
there is change in density throughout the medium
they can be propagated in liquid soild and gasses
example sound wave
transverse wave
they are composed of troughs and Crest
there is no pressure variations throughout the medium
there is no change in density
they can propagated in liquid soild but not gases
example light wave
Explanation:
a) 120m
b) since Q is the first order constructive interference, the distance between mid point of antennas and Q is 0.5 wavelengths (appear in A-Level question). so the wavelength should be (2)(30) =60m
60m
Ohm's Law => V = I/R where
V stands for voltage,
I stands for Current
R stands for resistance.
ATQ
we know V = 9 volts
and R = 1.5 ohm's
so we need to find I.
Lets modify our formula little bit
we know V = IR which we can write as I = V/R
so lets substitute the values in the formula.
I = 9/1.5
I = 6 A
Correct Option is A.
Call your parent, call a local taxi ,or a sober friend
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