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LenaWriter [7]
4 years ago
12

A riverbed slopes steeply down a hill. Which statement BEST explains the water’s potential energy at the top and bottom of the h

ill, all else being equal?
A. The potential energy of the water at the top of the hill will be less than the potential energy at the bottom because the water at the top is higher in Earth’s gravitational field.

B.The potential energy of the water at the top of the hill will be greater than the potential energy at the bottom because the water at the top is higher in Earth’s gravitational field.

C. The potential energy of the water at the top of the hill will be less than the potential energy at the bottom because the water at the bottom is higher in Earth’s gravitational field.

D. The potential energy of the water at the top of the hill will be greater than the potential energy at the bottom because the water at the bottom is higher in Earth’s gravitational field.
Physics
1 answer:
sergejj [24]4 years ago
7 0

B

Potential energy is the energy intrinsic of an object due to its relative position or motion, charge it holds, or stress within itself.

Explanation:

The water at the top of the hill can do work, when compared to the water at the bottom of the hill, because it is capable of acceleration, by gravity, down the hill and this kinetic energy can then be used to turn turbines to produce electricity.  The higher the elevation of the summit of the hill the higher the potential energy of the water at the top. The potential difference is the difference in potential energy of the water at the top and that at the bottom (which translates to the height of the hill).

Learn More:

For more on potential energy check out;

brainly.com/question/3076614

brainly.com/question/12489105

#LearnWithBrainly

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A car travelling at 55 mph for three and half hours would have travelled<br> how many miles
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What is one of the benefits that scientists have discovered from organisms' daily exposure to radioisotopes?
Sholpan [36]

Answer: 1. Being able to carbon date fossils

From the daily exposure to radioisotopes of organisms, scientists discovered to carbon date fossils. In carbon dating, the age of organic matter can be determined from the relative proportions of C-12 and C-14 i.e. isotopes of Carbon (carbon 12 and carbon 14). This ratio changes over the years because carbon-14 decays and is not replenished as there is no exchange with the atmosphere.

3 0
4 years ago
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The standard emf for the cell using the overall cell reaction below is +2.20 V: 2Al(s) + 3I2 (s) → 2Al3+ (aq) + 6I− (aq) The emf
Triss [41]

Answer: +2.10V

Explanation:

2Al(s)+3I_2(s)\rightarrow 2Al^{3+}(aq)+6I^-(aq)

Using Nernst equation :

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E_{cell}=E^o_{cell}-\frac{0.059}{n}\log [Al^{3+}]^2\times [I^-]^6

where,

E^o_{cell} = standard emf for the cell = +2.20 V

n = number of electrons in oxidation-reduction reaction = 6

E_{cell} = emf of the cell = ?

[Al^{3+}]  = concentration = 5.0\times 10^{-3}M

[I}^{-}]  = concentration = 0.10M

Now put all the given values in the above equation, we get:

E_{cell}=+2.20-\frac{0.059}{6}\log [5.0\times 10^{-3}]^2\times [0.10]^6

E_{cell}=2.10V

The standard emf for the cell using the overall cell reaction below is +2.10 V

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