Answer:
KE = 1/2mv^2
KE = 1/2(1120)(40^2)
KE = 560(1600)
KE = 896000
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Answer:
Explanation:
For moving particle , the wavelength is given by the expression
E is kinetic energy of the particle
Here particle is electron and its kinetic energy
E = 150 nm
= 1244 / 150
= 8.3 eV
8.3 X 1.6 X 10⁻¹⁹ J
=13.28 X 10⁻¹⁹ J
Putting these values in the expression for wavelength as given above we have
λ = .425 nm
Wave length of electron wave will be 0.425 nm
Hence its wavelength will be smaller and therefore magnitude of angle made by it will also be smaller. So magnitude of β will be smaller than that of α .
Answer:
c) Equal to R
b) the width of the resonance
Explanation: In general the impedance Z of an electrc circuit is:
Z = R + jX
Now when the circuit is capacitive, the above mentioned relation become Z = R + 1/jwc where ( w = 2πf )
And when the circuit is inductive Z becomes
Z = R + j wl
Resonance condition implies that the reactance created by capacitors are equal at the inductances produced by inductors, in other words the circuit will behaves as it were resistive.
The impedance will be equal to R
The Q factor is[
Q = X/R in which X is the module of either the capacitive or inductive reactance.
Q has an inverse relation with the band width.
Answer:
Time elapsed = 2.856
SECOND ROCK HAS FASTER SPEED
Explanation:
This can be achieved in 2 ways, and it is clear from the careful study that the travel time is attributed to the time required to cross the path above the bridge by the 2nd stone i.e.
14 = 9.8 * t
t = 1.428 sec and
time between 2 splash = 2 * 1.428 = 2. 857 sec
2nd way
let time for 1st spalsh be t and
second splash be t1.
from equation of motion
so 60 = 14t + 0.5 * 9.8 * t * t
4.9 t^2 + 14t -60 = 0
On solving, we get t = 2.351 sec
for t_1, we have some extra time, which can be divided into t2 and t3.
14 = 9.8 * t2
t2 = 1.428 sec
total time taken by 2 is
T = 1.428 + 1.428 + 2.351
so we get t_1 = 5.207 sec
time elapsed is = T - t
= 5.207 - 2.351
Time elapsed = 2.856
SECOND ROCK HAS FASTER SPEED
