Honestly, giving. I know that receiving may feel very good, and you get that new thing that you wanted but if you give, you feel really good when you see that smile on someone else’s face.
Answer:
atoms that have the same # of protons but a DIFFERENT # of NEUTRONS
Explanation:
I calculated on a sheet and used differentiation to solve the problems.
Answer:
Wavelength of sound wave corresponding to 20 Hz frequency will be 17.95 m
Explanation:
We have given that range of human hearing extends from 20 Hz and 20000 Hz
Velocity of sound wave is given 359 m /sec
We have to find the wavelength of the sound wave corresponding to 20 Hz
We know that velocity of sound wave is given by
, here v is velocity
is wavelength and f is frequency
So 

So wavelength of the sound wave corresponding to 20 Hz frequency will be 17.95 m
Note that
1 km/h = (1000 m)/(3600 s) = 0.27778 m/s
Initial velocity, v₁ = 25 km/h = 6.9444 m/s
Final velocity, v₂ = 65 km/h = 18.0556 m/s
Time interval, dt = 6 s.
Calculate average acceleration.
a = (v₂ - v₁)/dt
= (18.0556 - 6.9444 m/s)/(6 s)
= 1.852 m/s²
Answer:
The average acceleration is 1.85 m/s² (nearest hundredth)