We have energy E = hc/λ, where h is Planck's constant c is speed of light and λ is the wavelength.
So Energy ,
Energy of one mol =
Energy of one mol of photons generated from this device = 225 kJ
Answer:
Explanation:
Given the wave function
y(x,t) = 0.340 sin (15πt − 4πx + π/4)
Generally a wave function is of the form
y(x, t) = A•Sin(wt - kx + θ)
Where
A is amplitude
w is angular frequency
θ is the phase angle
k is the wave number.
Then, comparing this with given wave function
k = 4π, w = 15π and θ = π/4
Speed and direction?
The speed of a wave function can be determined using wave equation
v = fλ
w = 2πf
Then, f = w/2π = 15π/2π = 7.5Hz
Also k = 2π/λ
Then, λ = 2π/k = 2π/4π = 0.5 m
Then,
v = fλ = 7.5 × 0.5
v = 3.75m/s
Direction
Since the time and distance coefficient have opposite sign, for an increasing time interval, the translation will have to increase in the positive direction to nullify the change and maintain the phase. Hence, the wave is traveling in the positive x direction
Answer:
The answer is 4.55 m/s!
Explanation:
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Answer:
= 0.55 m
Explanation:
A standing wave is characterized by anti-nodes and nodes.
Antinodes are points on a standing wave at maximum amplitude, while nodes are points on the standing wave that are stationary and have zero amplitude.
The distance between two adjacent nodes or two adjacent anti-nodes is equivalent to half the wavelength.
Therefore, in this case the half wavelength is 27.5 cm.
Thus, wavelength = 27.5 × 2
= 55 cm
<u>= 0.55 m</u>
Answer
given,
mass of the block = 200 g = 0.2 Kg
Velocity at A = 0 m/s
Velocity at B = 8 m/s
slide to the horizontal distance = 10 m
height of the block be = 4 m
potential energy of the block
P = m g h
P = 0.2 x 9.8 x 4
P =7.84 J
kinetic energy
Work = P - KE
work = 7.84 - 6.14
work = 1.7 J
b) v² = u² + 2 a s
0 = 8² - 2 x a x 10
a = 3.2 m/s²
ma - μ mg = 0