Answer:
The minimum difference between the lengths of the two tubes should be 0.385 meters.
Explanation:
As we known that for any two waves to arrive in phase at any point the difference in the path traveled by the waves should be an integral multiple of the wavelength of the wave.
Mathematically we can write:

For the given wave we have

Applying values we get

Thus the minimum difference in the lengths of the tubes can be obtained by putting the value of n = 1

The correct answer would be to express large and small numbers.
Answer: -2.5
Explanation:
1/2(-5)= -2.5
-2.5(1)= -2.5
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The given statement "National Instant Criminal Background Check System is used for a person trying to access a government website" is false.
Answer: Option B
<u>Explanation:</u>
The National Instant Criminal Background Check System, additionally referred to as NICS, is meant to spot individuals prohibited underneath federal law from getting firearms from a licence dealer. However, there area unit several loopholes within the system.
This modification higher permits the news of the identities of prohibited individuals to the background check system and could be a important step toward up the public’s safety whereas continued to powerfully shield individuals’ privacy interests.