Answer:
1.7×10^5 ms-1
Explanation:
From
qE= qvB
q= charge on the electron
E = electric field
v= velocity
B= magnetic field
E= vB
v= E/B= 110×10^3/0.6
v= 1.7×10^5 ms-1
(a) The electron kinetic energy is
which can be converted into Joule by keeping in mind that
So that we find
The kinetic energy of the electron is related to its momentum p by:
where m is the electron mass. Re-arranging the equation, we find
And now we can use De Broglie's relationship to find its wavelength:
where h is the Planck constant.
(b) By using the same procedure of part (a), we can convert the photon energy into Joules:
The energy of a photon is related to its frequency f by:
where h is the Planck constant. Re-arranging the equation, we find
And now we can use the relationship between frequency f, speed of light c and wavelength
of a photon, to find its wavelength:
Answer:
effort arm mean the use of any work by using your hand force motion or by hand power
What is the heat extracted from the cold reservoir for the refrigerator shown in(Figure 1) ? Assume that W1 = -123J and W2 = 88J .
<span>Qc= _________ </span>
<span>Part B
</span>
K=105J
It gets into the atmosphere through evaporation, it wafts round as clouds and water vapor, then eventually precipitates out somewhere as rain or snow. This enters it into the biosphere, because every living thing on Earth needs water, and obviously in to the hydrosphere because... water is water. As moving water (streams, glaciers, etc.), it weathers and erodes the geosphere (the lithosphere is part of the geosphere). Deep down where rocks become sedimentary or metamorphosed, water also influences what kind of rock you get (as is also the case with cooling lava, but that's basically water at its first stage of entering the cycle).