<span>It's B. A Hypothesis
</span>
Answer:
The correct answer is option E
Explanation:
Relative density of the different phases of the same compound like water are basically determined by their number of molecules per volume when each of the molecules have the same mass in each of their phases.
Now, for the water vapor phase, it's molecules have very little interaction with themselves and so they are at large distance apart, whereas in ice(solid), molecules are in continuous contact with each other because they are at close distance between each other. Therefore, it's obvious that there are less molecules per liter in water vapour than in ice, and thus the density is smaller.
The correct answer is option E
Answer:
![8.84\cdot 10^{-7} m](https://tex.z-dn.net/?f=8.84%5Ccdot%2010%5E%7B-7%7D%20m)
Explanation:
The energy a single photon of an electromagnetic wave is given by
![E=\frac{hc}{\lambda}](https://tex.z-dn.net/?f=E%3D%5Cfrac%7Bhc%7D%7B%5Clambda%7D)
where
h is the Planck constant
c is the speed of light
is the wavelength of the photon
In this problem, we have
is the energy of the photon
So we can re-arrange the equation to find the wavelength:
![\lambda=\frac{hc}{E}=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{2.25\cdot 10^{-19} J}=8.84\cdot 10^{-7} m](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bhc%7D%7BE%7D%3D%5Cfrac%7B%286.63%5Ccdot%2010%5E%7B-34%7DJs%29%283%5Ccdot%2010%5E8%20m%2Fs%29%7D%7B2.25%5Ccdot%2010%5E%7B-19%7D%20J%7D%3D8.84%5Ccdot%2010%5E%7B-7%7D%20m)
Answer:
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Explanation:
sgfsdfsdfd sf d f d
Answer:
90 W
Explanation:
The power of the light bulb is given by:
![P=VI](https://tex.z-dn.net/?f=P%3DVI)
where
V is the voltage of the bulb
I is the current through the bulb
In this problem,
V = 120 V
I = 0.75 A
Substituting into the equation,
![P=(120)(0.75)=90 W](https://tex.z-dn.net/?f=P%3D%28120%29%280.75%29%3D90%20W)