This problem can be solved based on the rule of energy conservation, as the energy of the photon covers both the energy needed to overcome the binding energy as well as the energy of ejection.
The rule can be written as follows:
energy of photon = binding energy + kinetic energy of ejectection
(hc) / lambda = E + 0.5 x m x v^2 where:
h is plank's constant = 6.63 x 10^-34 m^2 kg / s
c is the speed of light = 3 x 10^8 m/sec
lambda is the wavelength = 310 nm
E is the required binding energy
m is the mass of photon = 9.11 x 10^-31 kg
v is the velocity = 3.45 x 10^5 m/s
So, as you can see, all the parameters in the equation are given except for E. Substitute to get the required E as follows:
(6.63x10^-34x3x10^8)/(310x10^-9) = E + 0.5(9.11 x 10^-31)(3.45x10^5)^2
E = 6.41 x 10^-16 joule
To get the E in ev, just divide the value in joules by 1.6 x 10^-19
E = 4.009 ev
Answer:
Animal Cells
Explanation:
they dont have cell walls because they dont need them. Wall cells are found in plants, which animals dont need.
Explanation:
volume=3x4x6=72cm³
density=mass/volume
so:
184.32/72=<u>2</u><u>.</u><u>5</u><u>6</u><u>g</u><u>/</u><u>cm³</u><u> </u><u>for</u><u> </u><u>the</u><u> </u><u>block</u>
Answer: The correct answer is "the same as the sum".
Explanation:
The expression for the equivalent resistance in the series combination of the circuit is as follows;
![R'=R_{1} +R_{2} +R_{3}](https://tex.z-dn.net/?f=R%27%3DR_%7B1%7D%20%2BR_%7B2%7D%20%2BR_%7B3%7D)
Here, R' is the equivalent resistance,
are the resistances.
The expression for the equivalent resistance in the parallel combination of the circuit is as follows;
![\frac{1}{R'} =\frac{1}{R_{1}} +\frac{1}{R_{2}}+\frac{1}{R_{3}}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BR%27%7D%20%3D%5Cfrac%7B1%7D%7BR_%7B1%7D%7D%20%2B%5Cfrac%7B1%7D%7BR_%7B2%7D%7D%2B%5Cfrac%7B1%7D%7BR_%7B3%7D%7D)
Here, R' is the equivalent resistance,
are the resistances.
In the series combination of the circuit, the equivalent resistance is more than the equivalent resistance in the parallel combination of the circuit.
In the series combination of the circuit, the same amount of current flows across the resistance but the voltage is different across the resistances.
Therefore, for resistor in series, the equivalent resistance is the same as the sum.
Stratosphere is THE LAYER OF ATMOSPHERE THAT PROTECTS US because it contains OZONE. Ozone is also a layer that protects us from the direct rays/ UV RAYS of the SUN