You are riding in a train that is traveling at a speed of 120km /h how long will it take to travel 950 km
1 answer:
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Answer:
Explanation:
Frequency of signal = 1260 KHz
= 1260 x 10³ = 126 x 10⁴ Hz
velocity of wave = 3 x 10⁸ m /s
wavelength = velocity / frequency
=
= 238 m
b )E(t) = E0 sin(2πft)
E(t) = 0.41 sin(2πft)
when t = 4.8 μs
= 4.8 x 10⁻ ⁶
E(t) = 0.41 sin(2π x 126 x 10⁴ x4.8 x 10⁻ ⁶ )
= 0.41 sin(2π x 126 x 10⁴ x4.8 x 10⁻ ⁶ )
= 0.41 sin(37.98 rad )
= .11 N/C