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Alex73 [517]
3 years ago
6

A grist mill of the 1800s employed a water wheel that was 8 m high; 490 liters per minute of water flowed onto the wheel near th

e top. How much power, in kW, could this water wheel have produced? Take the density of water to be 1,000 kg/m kW
Chemistry
1 answer:
Sedaia [141]3 years ago
3 0

Answer:

  0.64 kW

Explanation:

The potential energy of a mass (M) at some height (h) is computed from ...

  PE = Mgh

At 1 kg/liter, the available power is the rate at which that energy is available ...

  (490 kg/min)×(1 min/(60 s))×(9.8 m/s²)(8 m) ≈ 640.3 kg·m²/s³

  = 640.3 W

In kilowatts, that is 0.64 kW.

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What geometry does VSEPR predict for the central atom in NCl3
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Answer:

Tetrahedral electron geometry and trigonal pyramidal molecular geometry.

Explanation:

The Lewis structure is shown in Figure 1.

The central N atom has three bonding pairs and one lone pair, for <em>four electron groups</em>.

VSEPR theory predicts a tetrahedral electron geometry with bond angles of 109.5°.

We do not count the lone pair in determining the molecular shape.

The molecular geometry is trigonal pyramidal (see Figure 2).

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What is the relationship between the number of each atom used to form compound and oxidation number?
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Answer:Explanation:

In compounds, all other atoms are assigned an oxidation number so that the sum of the oxidation numbers on all the atoms in the species equals the charge on the species.

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3 years ago
The​ half-life of a certain tranquilizer in the bloodstream is 5050 hours. how long will it take for the drug to decay to 8686​%
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Using the exponential decay model; we calculate "k"
We know that "A" is half of A0
A = A0 e^(k× 5050)
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To calculate how long it will take to decay to 86% of the original mass
0.86 = e^(-0.0001371t)
In (0.86) = -0.0001371t
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Mitosis and Meiosis is dividing which organelle?
irinina [24]

Answer:

D

Explanation:

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VMariaS [17]
<span>Cr3+ O2- ; the formula is Cr2O3 ( criss cross)</span>
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