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mixas84 [53]
3 years ago
14

In a recent year, wind machines in a country generated 183.1 billion kWh of electricity, enough to serve over 17 million househo

lds. The nation's total electricity production that year was 4,098 billion kWh. What percent of the total energy production was generated by wind machines
Physics
1 answer:
Neko [114]3 years ago
5 0

Answer:

The right answer is "4.4%".

Explanation:

Given:

Generated electricity,

= 183.1 billion kWh

Total electricity production,

= 4098 billion kWh

Now,

The wind energy percentage will be:

= \frac{183.1}{4098}\times 100

= 0.0446\times 100

= 4.4 %

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3 0
4 years ago
List 3 cases in which potential energy becomes kinetic energy and three cases in which kinetic energy becomes potential energy.
Mrrafil [7]

Answer:

when you open a can of pop

when you jump on your bed

Explanation:

3 0
3 years ago
17. When people replace systems, even when they still work, this is an example of... *
Law Incorporation [45]

I'm gonna have to guess B) Automation sorry if I get it incorrect

3 0
3 years ago
Read 2 more answers
A proton moves through an electric potential created by a number of source charges. Its speed is 2.5 x 105 m/s at a point where
Kaylis [27]

Answer:

Proton’s speed, a short time later when it reaches a point of lower potential is 1.4 x 10⁵ m/s

Explanation:

Given;

initial speed of proton, u = 2.5 x 10⁵ m/s

initial potential, V = 1500 V

mass of proton = 1.67 x 10⁻²⁷ kg

Work done, W = eV= ΔK.E = ¹/₂mu²

eV = ¹/₂mu² (J)

where;

e is the charge of the proton in coulombs

V is the electric potential in volts

m is the mass of the proton in kg

u is the speed of the proton in m/s

m =\frac{2eV_1}{u_1{^2}} = \frac{2eV_2}{u_2{^2}} = \frac{V_1}{u_1{^2}}} =\frac{V_2}{u_2{^2}}

\frac{V_1}{u_1{^2}}} =\frac{V_2}{u_2{^2}} = \frac{1500}{(2.5*10^5)^2} = \frac{500}{u_2{^2}} \\\\u_2{^2} =\frac{500*(2.5*10^5)^2}{1500} = 0.333*6.25*10^{10}\\\\u_2 = \sqrt{0.333*6.25*10^{10}} =1.4 *10^5 \ m/s

Therefore, proton’s speed a short time later when it reaches a point of lower potential is 1.4 x 10⁵ m/s

4 0
4 years ago
According to the law of conservation of momentum, in a(n) _______ system, the initial total momentum before a collision equals t
Sergeeva-Olga [200]

Answer:

rhastuutse5r says he n and happiness of

Explanation:

UKDIAMOND is a great place to live and live and live in the world best friend tum jio hjaro and happiness of the day and the day of the day of the day of the day of the day of the day of 2nd century and the day of the day of

7 0
3 years ago
Read 2 more answers
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