Answer:
Work function,
Explanation:
Given that,
Frequency of light,
Kinetic energy of the ejected electrons,
We need to find the work function of the gold. Let it is W.
Using Einstein's photoelectric equation as follows :
So, the work function of gold is .
Answer:
Explanation:
Magnus is installing a re
3.32µF and 1.64µF
Since, you haven't actually asked a question, I am going to make a guess on what the question is based upon the data provided. My educated guess is "What are the values of the two capacitors?"
The formula for the Capacitive reactance is
X = 1/(2*pi*f*C)
where
X = reactance
f = frequency
C = capactance
Let's solve for C
X = 1/(2*pi*f*C)
CX = 1/(2*pi*f)
C = 1/(2*pi*f*X)
Now with the capacitors in parallel, we have a reactance of:
I = V/X
IX = V
X = V/I
X = 12.3/0.56
X = 21.96428571
So the capacitance is:
C = 1/(2*pi*f*X)
C = 1/(2*pi*1460*21.96428571)
C = 4.96307x10^-6 = 4.96307 µF
And with the capacitors in series we have a reactance of:
X = V/I
X = 12.3/0.124
X = 99.19354839
So the capacitance is:
C = 1/(2*pi*f*X)
C = 1/(2*pi*1460*99.19354839)
C = 1.09896x10^-6 = 1.09896 µF
Now we can setup two equations with 2 unknowns.
4.96307 = x + y
1.09896 = 1/(1/x + 1/y)
y = 4.96307 - x
1.09896 = 1/(1/x + 1/(4.96307 - x))
1.09896 = 1/((4.96307 - x)/(x(4.96307 - x)) + x/(x(4.96307 - x)))
1.09896 = 1/(((4.96307 - x)+x)/(x(4.96307 - x)))
1.09896 = 1/(4.96307/(x(4.96307 - x)))
1.09896 = x(4.96307 - x)/4.96307
5.45422 = x(4.96307 - x)
5.45422 = 4.96307x - x^2
0 = 4.96307x - x^2 - 5.45422
0 = -x^2 + 4.96307x - 5.45422
We now have a quadratic equation. Use the quadratic formula to solve, getting roots of 3.320460477 and 1.642609523. You may notice that those 2 values add up to 4.96307. This is not coincidence. Those are the values of the two capacitors in µF. Rounding to 3 significant figures gives us 3.32µF and 1.64µF.
If the cliff is 850m away, the sound travelled there and back which is 850m * 2 = 1700m
The sound took 5 seconds to travel 1700m, so it's moving at 1700m/5s = 340 m/s
Answer:
The correct answer is Dubnium which is denoted by the symbol Db.
pls give brainliest for the answer