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HACTEHA [7]
3 years ago
8

When the gas in a balloon is heated, the balloon expands. What are the correct signs of heat and work for this change?

Physics
1 answer:
iogann1982 [59]3 years ago
7 0

the correct answer would be C, i think:)

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7. A mother pushes her 9.5 kg baby in her 5kg baby carriage over the grass with a force of 110N @ an angle
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We have to look into the FBD of the carriage.

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To calculate normal force we have to look upon the vertical component of forces, as Normal force is acting vertically.We have weight which is a downward force along with F_x, force of 110\ N acting vertically downward.Both are downward and Normal is upward so Normal force =Summation\ of\ both\ forces

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We can see in the diagram that F_y=Horizontal and F_x=Vertical component of forces.

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