1
2
3
4
Correct answer is B
The fundamental frequency (Fo) = 40Hz
First overtone f1 = 2 \(\times\) 40 = 80
Second overtone f2 = 3 \(\times\) 40 = 120
Third overtone f3 = 4 \(\times\) 40 = 160.
Hence there are just two overtones between 40Hz and 150Hz
Which of the following instruments has a pure tone?
guitar
vibrating strings
tuning fork
siren
Correct answer is C
No explanation has been provided for this answer.
2500.00s
75.00s
4.00s
0.25s
Correct answer is C
Distance between the boat and crest = 100m
time = \(\frac{100}{25}\)
= 4sec
A wave has a frequency of 2Hz and a wavelength of 30cm. The velocity of the wave is
60.0ms-1
6.0ms-1
1.5ms-1
0.6ms-1
Correct answer is D
V = F\(\lambda\)
= 2 x 0.3
= 0.6ms-1
666J
8360J
666 000J
674 360J
Correct answer is D
Q = mL + mc\(\theta\)
= (2 x 333000) + (2 x 2090 x 2)
= 674 360J