Which of the following statements-about electromagnetic waves is not correct?
They carry energy as they travel through space
They travel with the speed of light
They are longitudinal
The electric and magnetic fields are at right angles to each other
Correct answer is C
All electromagnetic waves are:
28.6ºC
30.0 ºC
35.0 ºC
40.5 ºC
Correct answer is C
\(\frac{10.5-0}{30-0}\) = \(\frac{c-0}{100-0}\)
\(\frac{10.5}{30}\) = \(\frac{c}{100}\)
cross multiply:
10.5 * 100 = 30c
35.0 ºC = c
340 ms\(^{-1}\)
380 m s\(^{-1}\)
400 m s \(^{-1}\)
680 m s\(^{-1}\)
Correct answer is A
speed of the sound wave = \(\frac{distance * 2}{time}\)
= \(\frac{408 * 2}{2.4}\)
: speed of the sound wave = 340 ms\(^{-1}\)
longitudinal
transverse
mechanical
a sound wave
Correct answer is B
In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave's advance.
This is in contrast to a longitudinal wave which travels in the direction of its oscillations. Water waves are an example of transverse wave.
15 hours
30 hours
45 hours
60 hours
Correct answer is C
No explanation has been provided for this answer.