Answer: softer
The sound waves become weaker, so to an observer this wave is lighter sound.
Answer:
I believe it's A. An installment credit has an interest rate, repayment terms and fees, and fixed payment.
For the given question above, I think there is an associated choice of answer for it. However, the answer for this is London Dispersion Forces. <span>Dipole-dipole forces and hydrogen bonding are much stronger, leading to higher melting and boiling points.</span>
Answer:
The rate of change of the distance between the helicopter and yourself (in ft/s) after 5 s is
ft/ sec
Explanation:
Given:
h(t) = 25 ft/sec
x(t) = 10 ft/ sec
h(5) = 25 ft/sec . 5 = 125 ft
x(5) = 10 ft/sec . 5 = 50 ft
Now we can calculate the distance between the person and the helicopter by using the Pythagorean theorem
![D(t) = \sqrt{h^2 + x^2}](https://tex.z-dn.net/?f=D%28t%29%20%3D%20%5Csqrt%7Bh%5E2%20%2B%20x%5E2%7D)
Lets find the derivative of distance with respect to time
![\frac{dD}{dt} (t) = \frac{2h \cdot \frac{dh}{dt} +2x \cdot\frac{dx}{dt}} {2\sqrt{h^2 + x^2}}](https://tex.z-dn.net/?f=%5Cfrac%7BdD%7D%7Bdt%7D%20%28t%29%20%20%3D%20%5Cfrac%7B2h%20%5Ccdot%20%5Cfrac%7Bdh%7D%7Bdt%7D%20%2B2x%20%5Ccdot%5Cfrac%7Bdx%7D%7Bdt%7D%7D%20%7B2%5Csqrt%7Bh%5E2%20%2B%20x%5E2%7D%7D)
Substituting the values of h(t) and x(t) and simplifying we get,
![\frac{dD}{dt}(t) = \frac{50t \cdot \frac{dh}{dt} + 20 \cdot \frac{dx}dt}{2\sqrt{625\cdot t^2 + 100 \cdot t^2}}](https://tex.z-dn.net/?f=%5Cfrac%7BdD%7D%7Bdt%7D%28t%29%20%3D%20%5Cfrac%7B50t%20%5Ccdot%20%5Cfrac%7Bdh%7D%7Bdt%7D%20%2B%2020%20%5Ccdot%20%5Cfrac%7Bdx%7Ddt%7D%7B2%5Csqrt%7B625%5Ccdot%20t%5E2%20%2B%20100%20%5Ccdot%20t%5E2%7D%7D)
![\frac{dh}{dt} = 25ft/sec](https://tex.z-dn.net/?f=%5Cfrac%7Bdh%7D%7Bdt%7D%20%3D%2025ft%2Fsec)
![\frac{dx}{dt} = 10 ft/sec](https://tex.z-dn.net/?f=%5Cfrac%7Bdx%7D%7Bdt%7D%20%3D%2010%20ft%2Fsec)
=
=
ft / sec
The recessive trait will always show up