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:
The initial velocity was U=22.14m/s
Explanation:
Step one :
Applying the third equation of motion
v² = u²+ 2as
Where v= Final velocity
U =initial velocity
a= acceleration due to gravity
S= distance or displacement
Step two :
V= 0
a= 9.81m/s²
S=25m
U=?
Step three :
Substituting into the equation we have
0²=U²+2*9.81*25
0=U²+490.5
U²=-490.5
U=√490.5
U=22.14m/s
Answer:
The Density of Medium: Sound requires a medium to travel. The density of the medium is among the factors which affect the speed of sound. ...
The Temperature of The Medium: Higher the temperature, the higher is the speed of sound in the medium.
Explanation:
hope it helps
Answer:
144 ft
Explanation:
h(t) = -16t² + 64t + 80
The maximum height is at the vertex. We can find the vertex of a parabola using -b / (2a):
t = -64 / (2×-16)
t = 2
The vertex is at 2 seconds. The height of the stone at this time is:
h(2) = -16(2)² + 64(2) + 80
h(2) = 144
The maximum height is 144 feet.
Hi there!
Using the equation for the electric field produced by an infinite sheet of charge:
E = Electric field strength (150 N/C)
σ = Surface charge density (? C/m²)
ε₀ = Permittivity of free space (8.8542× 10⁻¹² C²/Nm²)
We can rearrange the equation to solve for the surface charge density (charge per unit area)
