Answer:
Explanation:
Given that,
Ey = 375•Cos[kx - (2.20 × 10¹⁴t)]
Speed of light
c = 3×10^8m/s
What is the wavelength?
Generally,
The wavelength of electromagnetic wave is give as
Ey = Emax•Cos(kx—wt)
k = 2π/λ
w = 2πf
Ey = Emax•Cos(2πx/λ—2πft)
Comparing this to the wave equation given,
We notice that,
2πx/λ = kx
Also,
2.20 × 10¹⁴t = 2πft
t cancels out
2.20 × 10¹⁴ = 2πf
f = 2.20 × 10¹⁴ / 2π
f = 3.5 × 10¹³ Hz
Since we are given that
c = 3×10^8m/s
Then, using relationship between c, v and λ.
c = fλ.
λ. = c/f
λ. = 3×10^8 / 3.5 ×10¹³
λ. = 8.57 × 10^-6m
λ. = 8.57 μm
The wavelength of the electromagnetic wave is 8.57 micro meter (8.57 μm)
Answer:
it represents group 2 and also it represents the group 3 stars
Explanation:
because i just took it and got it correct.
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles
Answer:
initial kinetic energy = final kinetic energy = m · v²
Explanation:
Hi there!
Since the gliders collide elastically, the kinetic energy and momentum of the system after the collision are the same as before the collision.
Then, the initial kinetic energy of the system will be equal to the final kinetic energy of the system.
The equation of kinetic energy for each glider is the following:
KE = 1/2 · m · v²
Where:
KE = kinetic energy.
m = mass of the glider.
v =velocity of the glider.
The sum of the kinetic energies of each glider is the kinetic energy of the system. Then, the initial kinetic energy of the system will be:
initial KE = 1/2 · m · v² + 1/2 · m · v²
initial KE = m · v²
Since the initial kinetic energy of the system is equal to the final kinetic energy of the system:
final KE = m · v²
Using the equation of momentum of the system:
initial momentum = m · v + m · (-v) = m (v-v) = 0
The initial and final momentum of the system is zero because both vectors cancel each other for being of the same magnitude but of opposite direction.
The plate that is covering most of the two continents
is the Eurasian plate.
The continents are
<span><span>
1. </span><span> Europe</span></span>
<span><span>
2. </span><span> Asia</span></span>
The Eurasian plate is a tectonic plate that amasses
the whole continent of what others call as “Eruasia”.
It takes part of the oceanic crust that starts from
the Mid-Atlantic Ridge and extends itself to northward of the Gakkel Ridge. The
size of this plate is for about 67,800,000 km according to statistics and
geography.