Answer:
b). False
Explanation:
A refractory material is a type of material that can withstand high temperatures without loosing its strength. They are used in reactors, furnaces, kilns, etc.
Refractory materials are certain super alloys and ceramics materials.
Properties of refractory materials :
1. Refractory materials have high melting point.
2.They acts barriers between high heat zone and low heat zone.
3. The specific heat of refractory material is very low.
4. Refractories that have high bulk densities are better in quality.
Hence, Refractory materials have a very high melting temperature.
Answer:
Explanation:
From the question we are told that:
Frequency selectivity ratio 
AM range 750 kHz to 2600 kHz
Therefore Bandwidth is
Generally the equation for The intermediate frequency is mathematically given by
Intermediate frequency=\frac{Bandwidth}{2}
Answer: Going outside to film it, not taking cover, trying to run away from the tornado, driving away, etc.
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