Yes, this is certainly ugly and scary.
Here's how to go about it:
-- Take the two resistors in the middle ... the 9 and the 8 .
They're in parallel.
Their equivalent resistance is something like 4.24 ohms. Whatever.
-- Take the two resistors around the outside on the right ... the 4 and the 6 .
Together, in series, they're equivalent to 10 ohms.
-- That 10 ohms is in parallel with the ~4.24 ohms in the box.
Now you have something like 2.98 ohms, all to the right of the 3 on top.
-- That 2.98 is in series with the 3.0 on top.
So there's 5.98 ohms.
-- The 20.0 is in parallel with the 5.98 ohms.
So that's about 4.6 ohms equivalent between 'A' and 'B'.
That's just off the top of my head. I won't sharpen it down
any further than that, because it's only 5 points, and you
should be able to do it now, using this approach.
A person runs up 40 stairs and then come down 10 steps
So total stairs upwards is given as
now here we will have total height reached
Now total energy used or mechanical work done is
Now the mechanical power is given as
Answer:
4.24nm
0.385eV
Explanation:
Maximum wavelength (λmax) :
λmax = ( hc) /Φ
h = plancks constant = 6.63 * 10^-34
c = speed of light = 3*10^8
1ev = 1.6 * 10^-19
Φ = 2.93eV = 2.93* (1.6*10^-19) = 4.688*10^-19
λmax = [(6.63 * 10^-34) * (3 * 10^8)] / 4.688*10^-19
λmax = 19.89 * 10^-26 / 4.688*10^-19
λmax = 4.242 * 10^-7 m
λmax= 4.24nm
B.)
E = hc / eλ eV
λ = 3.75nm = 3.75 * 10^-7m = 375 *10^-9
E = (6.63 * 10^-34) * (3 * 10^8) / (1.6 * 10^-19) * (375 * 10^-9)
E = 19.89 * 10^-26 / 600 * 10^-28
E = 0.03315 * 10^-26 + 28
E = 0.03315 * 10^2
E = 3.315 eV
Stopping potential : (3.315 eV - 2.93eV) = 0.385eV
W = F x d/x = (m x Ag) x h, therefore, mass (2kg x 9.8) x 2.5m = 49J
Answer:
i think it is f i could be wrong-
