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Question
When a force F stretches a rope of mass per unit length ρ, the velocity of a wave in the rope is given by
You have two ropes of the same length. The mass of the second rope is twice the mass of the first rope. The velocity of a wave in the second rope is ___________ the velocity of a wave in the first rope.
a. 1/ SQRT2 times
b.the same as
c.2 times
d.1/2
e. SQRT 2 times
Question
Compute the frequency (in MHz) of an EM wave with a wavelength of 7.3 in. (0.1854 m).
=MHz
Question
Why are the Doppler effect and diffraction not as commonly experienced with light as they are with sound? (Select all that apply.)
1.The wavelengths of light are very short, causing diffraction effects to be visible only for very small objects and very narrow openings.
2.The speed of light is very high, leading to very large Doppler shifts in the light emitted by common sources in motion relative to us.
3.The wavelengths of light are very short, causing diffraction effects to be visible only for very large objects and very wide openings.
4.The speed of light is very high, leading to very small Doppler shifts in the light emitted by common sources in motion relative to us.
Question
Draw and label a circuit with a power supply and a resistor. Write the equation for Ohm’s law solving for the value of the resistor.
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