Answer:
C. 10 W.
Explanation:
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In this case, since the power the person uses to lift the 10-N load is computed by using the formula:
Whereas W is the work and t the time; we can compute the work by multiplying the force applied in 1 m:
Now, we divide it by the time to obtain:
Since joules over seconds are watts.
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Answer:
0.3 J
Explanation:
The equation for heat capacity is Q = mcΔT where Q is the heat, m is the mass of the substance, c is the specific heat capacity of the substance and delta T is the change in temperature. Plugging those values into the equation, we have Q = (.500)(0.24)(27.5-25) = 0.3
Answer:
Copper carbonate undergoes thermal decomposition. The green copper carbonate decomposes when heated and forms copper oxide and carbon dioxide
Number of moles of a substance can be calculated from mass of the substance and its molar mass as follows:
Here, n is number of moles, m is mass and M is molar mass.
For aspirin: 324 mg
Molecular formula is and molar mass of aspirin is 180.157 g/mol, thus, number of moles will be:
For sodium hydrogen carbonate: 1904 mg
Molecular formula is and molar mass is 84.007 g/mol, thus, number of moles will be:
For citric acid: 1000 mg
Molecular formula is and molar mass is 192.124 g/mol, thus, number of moles will be:
Therefore, number of moles of aspirin, and citric acid in the tablet is 0.0018 mol, 0.0226 mol and 0.0052 mol respectively.
So the whole point is that you need a abstract.