1) A string, fixed at both ends, supports a standing wave with a total of 3 antinodes. This standing wave represents Gro

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1) A string, fixed at both ends, supports a standing wave with atotal of 3 antinodes. This standing wave represents
Group of answer choices
second harmonic
second overtone
first overtone
fundamental
none of the above
2)
Which statement is correct?
Group of answer choices
EM waves need a physical medium for wave propagation
Mechanical waves do not need a physical medium for wavepropagation
EM waves are longitudinal waves
Mechanical waves can only be transverse
None of the above
3)
The equation of a travelling wave is: y(x,t)= 2 sin (4 t+3x)
What is the speed of the wave?
4)
Given the following equation for a travelling wave: y(x,t)= 3πsin(π2t-πx)
What is the period of the wave?