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slamgirl [31]
3 years ago
13

You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would

select the compound with the ____________________ melting point.
Physics
1 answer:
nikitadnepr [17]3 years ago
4 0
The answer is <span>highest</span>
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A magnet contains a ____ numbers of magnetic domains
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a positively charged body makes contact with a body. after a while, the charged body becomes neutralised. state 3 main condition
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Why does the speed of sound depend on air temperature?
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A solar reflector is made using 31 identical triangular-shaped mirrors, each having sides . What is the total surface area of th
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Complete Question

Question 18 (3 points) Solve the problem. (3 points) A solar reflector is made using 31 identical triangular-shaped mirrors, each having sides 2.4m, 2. 3m, 1.5 m. What is the total surface area of the reflector?

A) 33 m2  

B) 86 m2

C) 52 m2

D)  34 m2

Answer:

The value is  Area  =2.78 \   m^2

Explanation:

From the question we are told that

   The  sides are  a =  2.4 m

                             b  =  2.3 m

                             c  =  1.5 m

Generally the semi perimeter is mathematically represented as

           s = \frac { a + b  + c  }{2 }

=>       s = \frac { 2.4  + 2.3  + 1.5   }{2 }

=>       s =3.1  \  m

Generally the using Heron's  formula we have that the  surface are a is  mathematically represented as

            Area  =  \sqrt{S (S -  a) (S - b )(S - c ) }

=>         Area  =  \sqrt{3.1  (3.1  -   2.4) (3.1  -  2.3 )(3.1  -  1.5 ) }

=>        Area  =2.78 \   m^2

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2 years ago
An object moves in uniform circular motion what is true regarding the force on the object
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The force on the object has a constant strength, but its direction
keeps changing.  The force is always directed from the object to
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