Answer:
Because they propagate due to presence of magnetic and electric field.
Explanation:
An Electromagnetic wave is a transversal wave conformed of an electric field perpendicular to a magnetic field.
Maxwell established that an electric field can generate a magnetic field and vice versa, which allows the propagation of the electromagnetic wave without a medium.
Answer:
k = 7.32 N/m
Explanation:
We know that the time period of a spring mass system is given as follows:
T = 2π√(m/k)
T² = 4π²m/k
k = 4π²m/T²
where,
k = force constant = ?
m = mass = 0.019 kg
T = Time Period = 0.32 s
Therefore,
k = 4π²(0.019 kg)/(0.32 s)²
<u>k = 7.32 N/m</u>
Net centripetal force is given by the product of mass and centripetal acceleration
Here we know that
mass (m) = 20 kg
speed (v) = 10 m/s
radius (R) = 15 m
So here we can say that centripetal acceleration is given as
now from the formula of force
<em>so correct answer would be 133 N</em>
<span>Valence electrons are electrons in the outermost shell available for bonding</span>
0.32 km
How to reach the answer:
The formula below provides the tsunami's speed in response to the query.
s = 356√d
when the tsunami's speed is 200 km/h, the equation's "s" is changed to "200," and the equation of speed is then expressed as follows.
200 = 356√d
The equation can be changed to compute the depth of the water as,
√d = 200÷356
√d = 0.562
Now on squaring both sides:
(√d)² = (0.562)²
d = (0.562)² = 0.316 or 0.32
Therefore the approximate depth of water for a tsunami travelling at 200km/h is 0.32 km
Know more about speed here:
brainly.com/question/19930939
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