Answer:
Adsorption
Explanation:
Sidewalk cooking of egg is very popular in America. In summer people release fireworks in night sky and cook egg on the concrete sidewalk to check the level of temperature. When sunlight fall on the sidewalk most of the light is reflected back but some darker material adsorbs some photon, and when these photons are transferred to egg molecules it causes vibration among them and produce heat and cook egg.
Answer:
2.30 eV
Explanation:
Some details of the problem are missing:
"Light of wavelength 540 nm is required to extract electrons from sodium. What is the work function of sodium?"
The equation that describes the photoelectric effect is
where:
is the energy of the incoming photon, with
is Planck constant
is the speed of light
is the work function of the material
K is the maximum kinetic energy of the emitted photoelectrons
The minimum energy needed by the photons to extract the photoelectrons is that for which the kinetic energy is zero, so
K = 0
Therefore we have
In this problem, we know that the wavelength of the incoming light is
Therefore, we can find the work function of sodium:
And converting into electronvolts,
<span>Freezing involves the decrease in value of latent heat by 80 Cal/gm and a change of state from the Liquid phase to the solid phase.
So, in short, Fill in the blank as follows:
1st blank = Release/decrease
2nd blank = Liquid
Hope this helps!
</span>
The first one is decreases because there are less molecules in the air.
The second on would be the last option, August 29, because a new moon occurs every 29 days.
The answer for the last one would be A, I presume, because when air masses arrive at a destination, it becomes dry.