Answer:
B) convection
Explanation:
Heat convection is the result of heat conducting between fluid or gas and solid, and is closely related to the flow of the fluid and condition of the interface.
First recall the equation that relates frequency to wavelength:
v = fw
Note that the v is the speed of light, a constant. Now plug in the information we know!
(3×10^8) = (6.67 × 10^14) w
Hit the numbers on the calculator and you'll get the wavelength, w. If you comment your answer I'll check it for you. :)
I think that ball a hit the ground because it says that it went straight down.
We can find the momentum of the rock by using De Broglie's relationship:
![p= \frac{h}{\lambda}](https://tex.z-dn.net/?f=p%3D%20%5Cfrac%7Bh%7D%7B%5Clambda%7D%20)
where
p is the momentum
h is the Planck constant
![\lambda](https://tex.z-dn.net/?f=%5Clambda)
is the De Broglie's wavelength
By using
![\lambda=3.32 \cdot 10^{-34} m](https://tex.z-dn.net/?f=%5Clambda%3D3.32%20%5Ccdot%2010%5E%7B-34%7D%20m)
, we find
![p= \frac{6.6 \cdot 10^{-34} Js}{3.32 \cdot 10^{-34} m}=1.99 kg m/s](https://tex.z-dn.net/?f=p%3D%20%5Cfrac%7B6.6%20%5Ccdot%2010%5E%7B-34%7D%20Js%7D%7B3.32%20%5Ccdot%2010%5E%7B-34%7D%20m%7D%3D1.99%20kg%20m%2Fs%20)
The momentum of the rock is
![p=mv](https://tex.z-dn.net/?f=p%3Dmv)
where
![m=50 g=0.05 kg](https://tex.z-dn.net/?f=m%3D50%20g%3D0.05%20kg)
is the mass and v is its velocity. Rearranging the equation, we find the speed of the rock: