Answer:
Speed, 
Explanation:
It is given that,
A light wave is described by the following function as :
![E(x,t)=A\ cos[(1.57\times 10^7)x-(2.93\times 10^{15})t]](https://tex.z-dn.net/?f=E%28x%2Ct%29%3DA%5C%20cos%5B%281.57%5Ctimes%2010%5E7%29x-%282.93%5Ctimes%2010%5E%7B15%7D%29t%5D)
.....(1)
The general equation of wave is given by :
........(2)
On comparing equation (1) and (2)
Wavelength, 
Frequency, 
Let v is the speed of the light wave. It is given by :
So, the speed of the light wave is 
. Hence, this is the required solution.
The average speed is 615.7 mph (275.2 m/s)
Explanation:
The average speed of an object gives a measure of how fast an object is moving over a certain time interval. It is a scalar quantity, and it is calculated as follows
where
v is the average speed
d is the distance covered
t is the time interval
For the jet in this problem, we have:
d = 1293 mi is the distance covered
t = 2.1 h is the time interval
Therefore, the average speed is:
We can also convert into SI units (m/s), keeping in mind that:
And so
Learn more about average speed:
brainly.com/question/8893949
brainly.com/question/5063905
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D.sound insulators prevent from being transmitted better than elastic solids
Explanation:
The correct option from the given choices is that, sound insulators prevent sound from being transmitted better than elastic solids.
Sound is a form of wave that transmits energy from one point to another.
This wave form is a longitudinal wave in nature.
During the propagation of sound, it requires a material medium to move.
Sound insulators are special materials designed not to transmit sound energy.
Such materials cuts off sound. They are better than elastic solids in preventing sound transmission.
learn more:
Sound wave brainly.com/question/3619541
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<span>The
answer is Local Area Network (LAN). Examples of LANs, are those in workplaces,
libraries, and universities. The nodes are
connected and share common resources over
a WiFi, Ethernet network, Token rings, and
etcetera. The opposite of LAN is a Wide Area Network (WAN) that covers a
wide geographical area.</span>
Explanation:
As the earth travels around the sun in the elliptical orbit it must also be know that the axis of the earth is tilted as well.
- So when the earth is at the farthest point and the tilt of the earth's axis is towards the sun in that case the sun rays always incident on the surface of the earth near the poles and hence there is sunlight for the 24 hours of the day. But the intensity of these rays is very low because of the their slanted angle of incident. In other words the same sun rays cover a larger area and the luminous intensity is reduced.
- When the earth is near to the sun we have an increased average temperature of the day during that phase giving us an experience of summer season and vice-versa is the condition in winter seasons. The tilt of the earths axis is responsible for variation in extremities of the seasons with respect to the geographical location.
