__________ is/are formed between two air masses that have different temperatures. (4 points) A: Wind B:The jet stream C:Clouds D
2 answers:
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The pressure exerted on the table due to the book is 200 N/m².
The given parameters;
- <em>mass of the book, m = 400 g = 0.4 kg</em>
- <em>dimension of the table, = 0.10m x 0.20 m.</em>
- <em>gravitational field strength g = 10 N/kg.</em>
The area of the table is calculated as follows;
A = 0.1 x 0.2 = 0.02 m²
The pressure exerted on the table due to the book is calculated as follows;
where;
- <em>F is the force of the book due to its weight</em>
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Thus, the pressure exerted on the table due to the book is 200 N/m².
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Answer:
5.886 J
Explanation:
Given:
The mass of the book is, kg
Height of lift is, m
Acceleration due to gravity is, m/s²
Now, gain in gravitational potential energy is a function of change in position and is given as:
Here, is the change in gravitational potential energy.
Plug in 0.5 kg for , 9.81 for
and 1.2 for
. Solve for
Therefore, the gain in gravitational energy of the book is 5.886 J.