1) Solids have a fixed shape
The particles of solids are held into their positions and are only able to vibrate about fixed points. The strength of the bonding means that the particles have their own shape, which they retain, and do not take the form of the container they are in.
2) Solids may not flow
The molecules of liquids are able to slide past one another due to weaker bonds between particles. This allows the liquid to flow; whereas, this movement is not possible in solids so they cannot flow.
3) Solids may fracture
The fact that solids possess a rigid structure means that they have the ability to fracture. Although some are able to withstand more stress than others, all solids may break. This breakage occurs when the intermolecular bonds are mechanically broken. This is not possible in the case of liquids because such rigid intermolecular bonds do not exist.
They all belong to the Electromagnetic Spectrum.
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Answer:
The correct option is B
Explanation:
CPR means cardiopulmonary resuscitation. CPR is done as a first aid in emergency situations such as heart attack, rescued drowned patient and other situations that causes an individual's breathing or heartbeat to stop. CPR is done so the heart can resume it's function of supplying oxygenated blood to the body organs (especially the brain).
Checking the pulse is quite important while performing CPR because it's a direct measurement of the heart rate which can be used to know the effectiveness of the CPR or the progress made during the course of the CPR. Unfortunately, CPR mannequins are plastics/rubbers and hence cannot have real pulse.
