Answer:
low powered radio frequency (RF) energy
Answer:
<em>The range of the ball is 11.6 meters</em>
Explanation:
<u>Projectile Motion
</u>
It's the type of motion that experiences an object launched with an initial angle and moves along a curved path exclusively under the action of gravity.
Being vo the initial speed of the object, θ the initial launch angle, and g the acceleration of gravity, then the maximum horizontal distance traveled by the object (also called Range) is:
The football is kicked with an initial speed of vo=11 m/s at an angle of θ=35°.
Calculating the range:
d = 11.6 m
The range of the ball is 11.6 meters
The answer is c 5 starrrrrr
<u>(A). The wavelength decreases by a factor of 3</u>.
<h3>Introduction :</h3>
Hi ! We all know that all type of electromagnetic wave, will have the same velocity as the speed of light, because light is part of electromagnetic wave too. The value of it is 300,000 km/s or m/s. As a result of this constant property, <u>the shorter the wavelength, the greater the value of the electromagnetic wave frequency</u>. This relationship can also be expressed in this equation:
With the following condition :
- c = the constant of the speed of light in a vacuum ≈ m/s
- = wavelength (m)
- f = electromagnetic wave frequency (Hz)
<h3>Explanation</h3>
In this problem, we underline one concept, namely : "<u>the shorter the wavelength, the greater the value of the electromagnetic wave frequency</u>". In question, the frequency of the waveform will increase by a factor of 3 from the beginning. So, to keep this value constant, the wavelength should be reduced by a factor of 3 from the initial condition.
<h3>Proof</h3>
Assume that:
- c = c' = speed of the electromagnetic wave is always the same (constant).
- = initial wavelength =
- f = initial frequency = f
- f' = final frequency = 3f
Let we count :
- = final wavelength = ...
Step by step :
(Q.E.D)
<h3>Conclusion</h3>
So, if the frequency value is increased by a factor of 3 from its original, then the wavelength will decrease by a factor of 3 from the original.
<h3>See More</h3>