Answer:
Explanation:
Frequency of 3 x 10¹⁵ , wavelength = 3 x 10⁸/3 x 10¹⁵ = 10⁻⁷ m = 1000A.
Energy in eV = 12375/1000 = 12.375 eV.
Maximum kinetic energy of ejected electrons = 6.1 eV
Work function = 12.375 - 6.1 = 6.275 eV.
Because when you think about it it has to start off as a solid
Answer:
The plate's surface charge density is
Explanation:
Given that,
Speed = 9800 km/s
Distance d= 75 cm
Distance d' =15 cm
Suppose we determine the plate's surface charge density?
We need to calculate the surface charge density
Using work energy theorem
Here, final velocity is zero
...(I)
We know that,
...(II)
From equation (I) and (II)
Charge is negative for electron
Put the value into the formula
Hence, The plate's surface charge density is
Velocity
,
m/s2
<span> Speed has direction and velocity.</span>
Here's a tip: The unit of frequency ... Hertz or Hz ... means "per second". "Five times PER SECOND" is a frequency of 5 Hz.