What type of waves are used to transmit cellular telephone messages?
1 answer:
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Answer:
correct answer is option 5 (The emission by the incident electron when it loses its energy in a single emission)
Explanation:
The emission by the incident electron when it loses its energy in a single emission then X-rays of minimum wavelength which is also known as X-rays of cut-off wavelength are emitted.
If potential V is applied on coolidge tube then cut-off wavelength of the continuous X-ray spectrum is related to the accelerating potential V by following equation
Angstrom/V
<u>The distance of the length YD is 3.57m, the velocity of the object at point D is 27m/s and the time required for the object to reach the ground is 0.17s</u>
Data given;
- Mass = 4kg
- Initial velocity = 20m/s
- length CD = 5m (from the image given)
a)
<h3>Determine The Length of YD</h3>θ =
b)
<h3>The velocity of the object at point D</h3>The change in kinetic energy is given as
Δ in kinetic energy = Δ in potential energy + work done by friction
K.E - 1/2m = mgh
- mgh
+ (-μmg.x)
K.E = mg(50 - 3.57) + (-mg(0.3*100) + 1/2 m
The velocity of the object at D with a distance of 5m.
c)
<h3>The the required for the object to reach ground</h3>The velocity of the object in the y-axis is
Acceleration in y-axis = 9.8
Height = 3.57m
h =
Taking the positive value
The time required for the object to reach ground is 0.17s
From the calculations above,<u> the distance YD is 3.57m, the velocity of the object at point D is 27m/s and the time required for the object to reach ground is 0.17s</u>
Learn more on projectile motion here;
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