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Sagot :
Answer:
1. A
2. B not sure
3. B
4. A
5. Medium
Explanation:
1. A wave carries energy from a source to a point some distance away. A wave is reflected by a barrier. The reflected wave moves away from the barrier at an angle that is equal to the angle with which the incoming wave moved towards the barrier. When a wave is slowed down, it refracts—that is, changes direction.
2. no exp.
3. Mechanical Wave: It requires a matter to propagate and these waves are also known as an elastic wave. Two types of mechanical wave are there; Longitudinal: Vibration of particles in a medium and the propagation of the wave in the same direction. Example: Sound waves in air.
4. All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.
5. A longitudinal wave is a type of mechanical wave, or wave that travels through matter, called the medium. In a longitudinal wave, particles of the medium vibrate in a direction that is parallel to the direction that the wave travels.
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