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3 years ago

Name 3 renewable energy resources

Physics

2 answers:

Ad libitum [116K]3 years ago

7 0

Solar energy, wind energy, hydro energy

babymother [125]3 years ago

3 0

Tidal power, hydroelectricity, biomass

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A wheel is rotating at a rate of 2.0 rev every 3.0s. through what angle, in radian , does the wheel rotate in 1.0s?

igomit [66]

Answer:

$4 \pi$

Explanation:

First of all, let's convert 2.0 rev into radians:

$1.0 rev = 2\pi rad\\2.0 rev = 4 \pi rad$

This means that the angular speed of the wheel is

$\omega = 2.0 rev/s = 4 \pi rad/s$

The angle through which the wheel rotates in a time t is given by

$\theta=\omega t$

And substituting t=1.0 s, we find

$\theta=(4\pi rad/s)(1.0 s)=4 \pi rad$

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3 years ago

The picture shows two different species of mammals that use wings to glide among tree tops. However, scientists theorize that th

AlekseyPX

Answer:

Explanation:

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3 years ago

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The initial concentration of N2O4 is 0.45M The system is heated and allowed to reach equilibrium. At equilibrium concentration o

Damm [24]

Answer : The value of equilibrium constant $K_c$ for the following reaction will be, 2.4

Explanation : Given,

Initial concentration of $N_2O_4$ = 0.45 M

Equilibrium concentration of $NO_2$ = 0.30 M

$K_c$ is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.

The given balanced equilibrium reaction is,

$N_2O_4(g)\rightleftharpoons 2NO_2(g)$

As we know that the concentrations of pure solids are constant that means they do not change. Thus, they are not included in the equilibrium expression.

Actual concentration of $NO_2$ at equilibrium = $2\times 0.30M=0.6M$

Concentration of $N_2O_4$ at equilibrium = $[N_2O_4]-[NO_2]=0.45-0.30=0.15M$

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[NO_2]^2}{[N_2O_4]}$

Now put all the given values in this expression, we get :

$K_c=\frac{(0.6)^2}{(0.15)}$

$K_c=2.4$

Therefore, the value of equilibrium constant $K_c$ for the following reaction will be, 2.4

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3 years ago

The partition coefficient K in a gas chromatographic experiment can be described by: Cm Cs K = where "Cs" and "Cm" refer to the

Amiraneli [1.4K]

Explanation:

K in chromatography is defined as a partition coefficient. It is an equilibrium constant that determines the measure to which the solutes partition between two phases.

K = Cm/Cs

where Cm is solute concentration in mobile phase

Cs is solute concentration in stationary phase

When K is more, then it implies that the solute concentration in the mobile phase is more in chromatography test.

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3 years ago

Please do parts (a) and part (b) below and include diagrams where applicable:

Harlamova29_29 [7]

Answer:

Part a)

m = 232.1 gram

Part b)