Answer:
c. The group speed is less than the phase speed.
Explanation:
For an individual the speed is given by v phase = w/k
w is angular frequency and k is wave number.
This is called phase speed. Group speed is the speed of wave packet.The rate of advance of a crest on a single wave point which is fixed phase.
Answer:
Inversly or Indirectly
Explanation:
the voltage (V) and inversely proportional to the resistance (R).
Hope it helps!
Answer:
227.9MPa
Explanation:
Length of the flaws is given by
2b = 5.8microns
b = 2.9 × 10⁻⁶m
The relation between the radius of curvature and length and width of the elliptical flaw


Equation for stress at the tip of an elliptical surface flaw


Answer:
ampere = 15.95 mA
Explanation:
given data
deposit gold = 0.560 g
time = 4.70 hour = 16920 s
solution
we get here moles of gold that is
moles of gold = 0.560 g ÷ 196.967 g/mol
moles of gold = 0.0028
moles of gold = 0.0028 ( 1 Faraday / 1 mol )
moles of gold = 0.0028 Faradays
moles of gold = 0.0028 Faradays × 96500 Coulom/ faraday
moles of gold = 270.2 coulombs
and we get here ampere that is
ampere = 
ampere = 0.01596 A
ampere = 15.95 mA