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1 answer:
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A: Has a higher frequency --> X-rays
B: Travels at the same speed --> Both
C: Has a longer wavelength --> Radio waves
Explanation:
Electromagnetic waves are waves consisting of oscillations of electric and magnetic field in a direction perpendicular to the direction of motion of the wave.
Electromagnetic waves travel at the speed of light () in a vacuum, and they are transverse in nature (the direction of vibration is perpendicular to the direction of propagation).
Electromagnetic waves are classified into different types according to their wavelength and frequency. In order from shortest to longest wavelength (and so, from highest to lowest frequency, since frequency is inversely proportional to the wavelength), we have:
Gamma rays
X-rays
Ultraviolet radiation
Visible light
Infrared radiation
Microwaves
Radio waves
Therefore, we can no says that:
X-rays: has a higher frequency than Radio waves
Radio waves: have a longer wavelength than x-rays
Both: they travel at the same speed
Therefore, the correct pairing is:
A: Has a higher frequency --> X-rays
B: Travels at the same speed --> Both
C: Has a longer wavelength --> Radio waves
Learn more about electromagnetic waves:
#LearnwithBrainly
Answer:
Explanation:
mass of car, m = 1022 kg
mass of truck, M = 1620 kg
initial velocity of truck, U = 14.5 m/s
initial velocity of car, u = 0 m/s
Let the final velocity of car is v and the final velocity of truck is V.
Collision is elastic, so the coefficient of restitution, e = 1
Use conservation of momentum
initial momentum of car + initial momentum of truck = final momentum of car + final momentum of truck
m x u + M x U = m x v + M x V
0 + 1620 x 14.5 = 1022 v + 1620 V
23490 = 1022 v + 1620 V ..... (1)
Use the formula of coefficient of restitution
1 (14.5 - 0) = v - V
14.5 = v - V
V = v - 14.5 .... (2)
Put in equation (1)
23490 = 1022 v + 1620 (v - 14.5)
23490 = 1022 v + 1620 v - 23490
46980 = 2642 v
v = 17.8 m/s
Put in equation (2)
V = 17.8 - 14.5
V = 3.3 m/s
Thus, the speed of car is 17.8 m/s and the velocity of truck is 3.3 m/s after collision.