Answer: The correct answer is "the speed of the wave becomes four times".
Explanation:
The relation between the speed, frequency and the wavelength is as follows:
v=f\lambda
Here, v is the speed of the wave, f is the frequency and \lambda is the wavelength.
The speed of the sound wave is directly proportional to the frequency.
In the given problem, if the speed of the sound wave is increased four times then the speed of the sound becomes four times.
Therefore, the speed of the sound wave becomes four times.
<span>This is an agrarian society, taken to its extreme. These societies are largely dependent upon farming and related activities as a way of earning income, and also for using the farmed items as a way of supporting oneself as food and clothing.</span>
It might make more sense putting it another way but this is basically it. you just take the minutes and divide them by 60 to convert them to hours. then simplify the ratio
Answer:
B can take 0.64 sec for the longest nap .
Explanation:
Given that,
Total distance = 350 m
Acceleration of A = 1.6 m/s²
Distance = 30 m
Acceleration of B = 2.0 m/s²
We need to calculate the time for A
Using equation of motion
![s=ut+\dfrac{1}{2}at_{A}^2](https://tex.z-dn.net/?f=s%3Dut%2B%5Cdfrac%7B1%7D%7B2%7Dat_%7BA%7D%5E2)
Put the value in the equation
![30=0+\dfrac{1}{2}\times1.6\times t_{A}^2](https://tex.z-dn.net/?f=30%3D0%2B%5Cdfrac%7B1%7D%7B2%7D%5Ctimes1.6%5Ctimes%20t_%7BA%7D%5E2)
![t_{A}=\sqrt{\dfrac{30\times2}{1.6}}](https://tex.z-dn.net/?f=t_%7BA%7D%3D%5Csqrt%7B%5Cdfrac%7B30%5Ctimes2%7D%7B1.6%7D%7D)
![t_{A}=6.12\ sec](https://tex.z-dn.net/?f=t_%7BA%7D%3D6.12%5C%20sec)
We need to calculate the time for B
Using equation of motion
Put the value in the equation
![30=0+\dfrac{1}{2}\times2.0\times t_{B}^2](https://tex.z-dn.net/?f=30%3D0%2B%5Cdfrac%7B1%7D%7B2%7D%5Ctimes2.0%5Ctimes%20t_%7BB%7D%5E2)
![t_{B}=\sqrt{\dfrac{30\times2}{2.0}}](https://tex.z-dn.net/?f=t_%7BB%7D%3D%5Csqrt%7B%5Cdfrac%7B30%5Ctimes2%7D%7B2.0%7D%7D)
![t_{B}=5.48\ sec](https://tex.z-dn.net/?f=t_%7BB%7D%3D5.48%5C%20sec)
We need to calculate the time for longest nap
Using formula for difference of time
![t'=t_{A}-t_{B}](https://tex.z-dn.net/?f=t%27%3Dt_%7BA%7D-t_%7BB%7D)
![t'=6.12-5.48](https://tex.z-dn.net/?f=t%27%3D6.12-5.48)
![t'=0.64\ s](https://tex.z-dn.net/?f=t%27%3D0.64%5C%20s)
Hence, B can take 0.64 sec for the longest nap .