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A sound wave has a frequency of 4 kHz and a wavelength of 40 cm. The time taken by the sound wave to travel a distance of 3.2 km is

Correct Answer: 2.0 s

A signal containing only two frequency components (3 kHz and 6 kHz) is sampled at the rate of 8 kHz, and then passed through a low pass filter with a cut-off frequency of 8 kHz. The filter output

A sound wave has a frequency of 4 kH2 and a wavelength of 40 cm. The time taken by a sound wave to cover a distance of 3.2km is-

A sound wave has a frequency of 3.5 kHz and its wavelength is 0.1 m. So how much time required to cover a distance of 700 meters?

Let x(t) = 2cos(800πt) + cos(1400πt).x(t) is sampled with the rectangular pulse train shown in the figure. The only spectral components (in kHz) present in the sampled signal in the frequency range 2.5 kHz to 3.5 kHz are
Digital Communication mcq question image

A sound wave with frequency f travels through air at speed v. With what speed will a sound wave with frequency 4f travel through the air?

In a public bathroom there are n taps 1,2,3...n. Tap1 and Tap2 take equal time to fill the tank while Tap3 takes half the time taken by Tap2 and Tap4 takes half the time taken by Tap3. Similarly each next number of tap takes half the time taken by previous number of Tap i.e, K-th Tap takes half the time taken by (K-1)th Tap.If the 10th tap takes 2 hours to fill the tank alone then what is the ratio of efficiency of 8th tap and 12th tap, respectively?

If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz.

In the following items, each passage consists of six sentences. The first and the sixth sentence are given in the beginning as S1 and S6. The middle four sentences in each have been removed and jumbled up. These are labeled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your response accordingly on the Answer Sheet. S1 :Why do the English travel?
S6:For here, in cosmopolitan England, one is always exposed to the danger of meeting all sorts of peculiar aliens.
P:Besides, they are taught that travel broadens the mind.
Q:They do so mainly because their neighbor does this and they have caught the bug from him.
R:Although they have now discovered the sad truth that whatever travel may do to the mind, it certainly broadens other parts of the body.
S:But, and perhaps mainly, they travel to avoid foreigners. The proper sequence should be

An underwater sonar source operating at a frequency of 60 kHz directs its beam towards the surface. If velocity of sound in air is 330m/s, wavelength and frequency of the waves in air are ___________

I travel 20 miles towards north and then travel 25 miles eastward. I then travel 40 miles rightwards, then travel 30 miles towards left and then travels 12 miles to the left and finally 20 miles northwards. How far am i pproximately from my original destination and in what direction ?