Answer:
B. Burns cleaner than coal
When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
The alteration of serial numbers belong to the "Recovery of stolen electrical goods" phase.
NC, sterilization or removing a serial range is usually charged as a secondary offense aboard a thievery offense. Generally, a person who alters or removes a serial range is doing this to hide the actual fact that they either scarf the property or received transferred possession. As such, there's a public interest in toilsome people who have interaction during this activity.
<u>Answer</u>:
D. Models are not the "real thing" so it will never correctly represent the system in all respects.
This is the limitation of a scientific model
<u>Explanation</u>:
Scientific models are simplified than the real concept. It is not substitute for those scientific experiment which is continuously generating data. In scientific model lots of problem occur. In most of the scientific model we find details are missing. Models are based on approximation. It doesn’t give proper information about that topic. Scientific model has less accuracy. In process of making simpler, these models lost the accuracy. It cannot represent all the detail which eventually creates lots of problem in understanding the topic
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