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3 years ago

Electricity produced by waterpower is ____.

Physics

2 answers:

Vikentia [17]3 years ago

7 0

Answer:

Option (D)

Explanation:

The plant in which the electricity is produced by use of water is called hydroelectric power station.

Water is stored in huge dams and then allow to fall from a great height. The potential energy of stored water is converted into kinetic energy of the flowing water. Then this kinetic energy rotates the turbines and converted into mechanical energy and then finally the coil of generator rotates and electric energy is produced.

kogti [31]3 years ago

6 0

D. Hydroelectric (hydro = water)

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Which element would you expect to gain one electron in a chemical reaction ?

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Answer: Hydrogen

Explanation: Which element would you expect to gain one electron in a chemical reaction ? HYDROGEN

Non-metals are more likely to gain electrons!

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2 years ago

I need help with the second one asap

dangina [55]

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3 years ago

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Which statement identifies the chemical property of iron that results in the formation of rust?

Maru [420]

Answer:

B, It reacts with oxygen to form a new substance

Explanation:

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2 years ago

The noble gases neon (atomic mass 20.1797 u) and krypton (atomic mass 83.798 u) are accidentally mixed in a vessel that has a te

vagabundo [1.1K]

Answer:

(a) Kav Ne = Kav Kr = 7.29x10⁻²¹J

(b) v(rms) Ne= 659.6m/s and v(rms) Kr= 323.7m/s

Explanation:

(a) According to the kinetic theory of gases the average kinetic energy of the gases can be calculated by:

$K_{av} = \frac{3}{2}kT$ (1)

where $K_{av}$ : is the kinetic energy, k: Boltzmann constant = 1.38x10⁻²³J/K, and T: is the temperature

From equation (1), we can calculate the average kinetic energies for the krypton and the neon:

$K_{av} = \frac{3}{2} (1.38\cdot 10^{-23} \frac{J}{K})(352.2K) = 7.29\cdot 10^{-21}J$

(b) The rms speeds of the gases can be calculated by:

$K_{av} = \frac{1}{2}mv_{rms}^{2} \rightarrow v_{rms} = \sqrt \frac{2K_{av}}{m}$

where m: is the mass of the gases and $v_{rms}$ : is the root mean square speed of the gases

For the neon:

$v_{rms} = \sqrt \frac{2(7.29 \cdot 10^{-21}J)}{20.1797 \frac{g}{mol} \cdot \frac {1mol}{6.022\cdot 10^{23}molecules} \cdot \frac{1kg}{1000g}} = 659.6 \frac{m}{s}$

For the krypton:

$v_{rms} = \sqrt \frac{2(7.29 \cdot 10^{-21}J)}{83.798 \frac{g}{mol} \cdot \frac {1mol}{6.022\cdot 10^{23}molecules} \cdot \frac{1kg}{1000g}} = 323.7 \frac{m}{s}$

Have a nice day!

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3 years ago

As a sample's temperature increases, which two factors also increase?

mote1985 [20]

Particle kinetic energy and particle speed

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3 years ago