In the circuit diagram, what does the symbol made of two long lines and two short lines with a positve and a negative sign at ea
ch end represent?
a.
an electrical conductot
b.
a closed switch
c.
a source of electrical energy
d.
an electrical resistor
a.
an electrical conductot
b.
a closed switch
c.
a source of electrical energy
d.
an electrical resistor
1 answer:
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Answer:
Speed of physicist car is 0.036c or 1.08 x 10⁷ m/s .
Explanation:
Doppler Effect is defined as the change in frequency or wavelength of the wave as the source or/and observer moving away or towards each other.
In this case, the Doppler effect equation in terms of wavelength is :
......(1)
Here is source wavelength,
is observed wavelength, v is speed of the observer and c is the speed of light.
Given :
Source wavelength, = 660 nm = 660 x 10⁻⁹ m
Observed wavelength, = 555 nm = 555 x 10⁻⁹ m
Substitute these values in the equation (1).
v = 1.08 x 10⁷ m/s