Answer:
elastic partial width is 2.49 eV
Explanation:
given data
ER E = 250 eV
spin J = 0
cross-section magnitude σ = 1300 barns
peak P = 20ev
to find out
elastic partial width W
solution
we know here that
σ = λ²× W / ( E × π × P ) ...................1
put here all value
σ = (0.286)² × W ×
/ ( 250 × π × 20 )
1300 ×
= (0.286)² × W ×
/ ( 250 × π × 20 )
solve it and we get W
W = 249.56 ×
so elastic partial width is 2.49 eV
The temperature of a fluid rises when energy is given to it. This phenomenon can be described by the equation:
Q = MCp ΔT
where,
Q is the quantity of added energy.
M is the fluid's mass.
The fluid's heat capacity is denoted by Cp.
T stands for temperature change.
<h3>What happens to a fluid's kinetic energy as the temperature rises?</h3>
The mean kinetic energy of the particles in a liquid rises with temperature. The molecules' higher average kinetic energies allow them to more easily overcome the attraction forces that keep them bound together.
<h3>Which temperature rise makes liquids more fluid?</h3>
The most significant determining factor for fluidity is pouring temperature. Therefore, the fluidity increases as the pouring temperature increases.
<h3>How does a liquid react when the temperature rises?</h3>
Particles in a solid, liquid, or gas move more quickly as its temperature rises. The particles slow down as the temperature drops. When a liquid is sufficiently cooled, it turns into a solid.
learn more about temperature of the fluid here
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Answer:
a.2.5x 10^3 m/s
b.mr=48kg/s
Explanation:
A rocket is moving away from the solar system at a speed of 7.5 ✕ 103 m/s. It fires its engine, which ejects exhaust with a speed of 5.0 ✕ 103 m/s relative to the rocket. The mass of the rocket at this time is 6.0 ✕ 104 kg, and its acceleration is 4.0 m/s2. What is the velocity of the exhaust relative to the solar system? (B) At what rate was the exhaust ejected during the firing?
velocity of the exhaust relative to the solar system
velocity of the rocket -velocity of the exhaust relative to the rocket.
7.5 ✕ 103 m/s-5.0 ✕ 103 m/s
2.5x 10^3 m/s
. b we will look for the thrust of the rocket
T=ma
T=6.0 ✕ 104 kg*4.0 m/s2
T=2.4*10^5N
f=mass rate *velocity of the exhaust
T=2.4*10^5N=mr*5.0 ✕ 10^3 m/s
mr=2.4*10^5N/5.0 ✕ 10^3
mr=48kg/s
A. Gamma is the correct answer I do believe.
Answer:
1.
and
2.
Explanation:
The energy of a photon is given by the so-called Planck-Einstein relation:

where E is the energy, f the frequency,
the wavelength, c the speed of light and h the planck constant
So, we have:

And:

2. The work function is the amount of energy required to remove an electron from the material. Therefore the kinetic energy of the photoelectrons will be the energy of the electromagnetic radiation minus the work function:

Where K is the kinetic energy and W the work function, for copper W=4.7eV
Rewriting for
:

This wavelength corresponds to the ultraviolet range