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irakobra [83]
3 years ago
13

Some steamboat restaurants use paper pots for their customers to boil the food themselves. What is the reason for the paper not

to catch fire when in contact with the flame? The paper is thin and therefore heat is conducted quickly to the water in the paper pot. Water has a boiling point lower than the burning temperature of the paper. The paper is thick enough to withstand the high temperature of the flame.
1 and 2 only


1 and 3 only



2 and 3 only



1, 2, and 3
Physics
1 answer:
Ber [7]3 years ago
7 0

Answer: D. 1,2,3 

The paper pots used in steamboat restaurants will not catch fire when in contact with the flame for the heat is conducted quickly to the water because the paper is thin and the burning temperature of the paper is much higher than the boiling point of water. Lastly, the texture of the paper is thick that it can withstand the temperature of the flame.

 

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3 years ago
The momentum of an object is 35 kg•m/s and it is travelling at a speed of 10 m/s.
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Answer:

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3 years ago
A motorboat traveling with a current can go 160 km in 4 hours. against the current it takes 5 hours to go the same distance. Fin
MatroZZZ [7]
<h2>Speed of motorboat is 36 km/hr and speed of current is 4 km/hr.</h2>

Explanation:

Let speed of motor boat be m and speed of current be c.

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   Distance = 160 km

   Time = 4 hours

    Speed = m + c

   We have

            Distance = Speed x Time

            160 = (m+c) x 4

            m + c = 40     --------------------- eqn 1

Against the current it takes 5 hours to go the same distance.

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   We have

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eqn 1 + eqn 2

           2m = 40 + 32

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Substituting in eqn 1

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Speed of motorboat is 36 km/hr and speed of current is 4 km/hr.

3 0
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