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Nataly [62]
3 years ago
5

PLZZZZZZZZ HELPPPP A group of students is investigating whether the smoothness of a surface affects the force of friction. Each

student pushes a book on two different surfaces. One surface is ice and the other is concrete. The distance traveled by the book on each surface is shown. Experimental Observations Student 1 Student 2 Student 3 Student 4 Distance traveled by book on ice 23 cm 21 cm 24 cm 22 cm Distance traveled by book on concrete 15 cm 18 cm 16 cm 17 cm Based on the table, which conclusion is correct about the average distance traveled? It is less on concrete. It is greater on concrete. It is less when the book is pushed harder. It is independent of the type of surface.
Chemistry
1 answer:
Mariulka [41]3 years ago
7 0

Answer:

ice

Explanation:

uhh concrete has rougher surface

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Explanation:

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A gas has a pressure of 810 kPa at 227°C. What will its pressure be at 27°C?
NeX [460]

486 kPa will be the pressure of gas at 27 degrees.

Explanation:

Data given :

Initial pressure of the gas P1 = 810 kPa

initial temperature of the gas T1 = 227 degrees OR 500.15 K

final pressure of the gas =?

final temperature of the gas = 27 degrees OR 300.15 K

Gay Lussac's law is used to calculate the pressure of the gas at 27 degrees or 300.15 K

\frac{P1}{T1} = \frac{P2}{T2}

P2 = \frac{P1T2}{T1}

 Putting the values in the equation:

P2 = \frac{810 X 300.15}{500.15}

P2 = 486 KPa

486 Kpa is the pressure of the gas when temperature was reduced to 27 degrees.

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Answer:

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