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anastassius [24]
3 years ago
11

Three samples were weighed using three different balances. all measurements are as accurate as the precision below indicates. th

e weights are 1.21 kg, 546 mg, and 23.14 g. using significant figures, the total mass should be reported as
Physics
1 answer:
lana [24]3 years ago
4 0
In adding measurements, we should remember that the units of the values to be added should be homogeneous which means all addends should have the same units. For this case, we must convert all the masses to units grams. The total mass of the of the all the masses weighed is:

1.21 kg ( 1000 g / 1 kg ) + 546 mg ( 1 g / 1000 mg ) + 23.14 g = 1233.686 grams
To correctly report this, it should be written in scientific notation which would be 1.23 x 10^3 g. In adding, the least number of significant figures should be followed. In this case, it is 3 significant figures.
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Answer:

maximum possible temperature is 34.088°C

Explanation:

Given data

power output Q = 37 kW

volume flow rate = 11 x 10^-5 m3/s

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maximum possible temperature T

solution

we can say

total water volume  = 4 residents  × volume flow

total water volume = 4 × 11 x 10^-5  = 44 × 10^-5 m³/s

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total water mass = 1000 kg/m³ ×  44 × 10^-5  

total water mass = 0.44 kg

we know

dQ/dt = (dm/dt)× (S)× ( T - t)

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