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3 years ago

HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Physics

1 answer:

Levart [38]3 years ago

5 0

It is an example of "Elastic Potential Energy"

In short, Your Answer would be Option C

Hope this helps!

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Liquid sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633°C and 400.0 torr at 823°C. Calculate

kaheart [24]

Answer:

H vaporization = 100.0788 kJ/mol

Explanation:

Use clausius clapyron's adaptation for the calculation of Hvap as:

$ln\frac {P_2}{P_1}=\frac {H_{vap}}{R}(\frac {1}{T_1}-\frac {1}{T_2})$

Where,

P₂ and P₁ are the pressure at Temperature T₂ and T₁ respectively.

R is the gas constant.

T₂ = 823°C

T₁ = 633°C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So, the temperature,

T₂ = (823 + 273.15) K = 1096.15 K

T₁ = (633 + 273.15) K = 906.15 K

P₂ = 400.0 torr , P₁ = 40.0 torr

R = 8.314 J/K.mol

Applying in the formula to calculate heat of vaporization as:

$ln \frac {400}{40}=\frac {H_{vap}}{R} (\frac {1}{906.15}-\frac {1}{1096.15})$

Solving for heat of vaporization, we get:

H vaporization = 100078.823 J/mol

Also, 1 J = 10⁻³ kJ

So,

H vaporization = 100.0788 kJ/mol

4 0

3 years ago

Which is the best term to describe a chemical reaction in which the reactants have less potential energy than the products?

bezimeni [28]

Answer:

C.endothermic

Explanation:

chemical reactions

6 0

3 years ago

Some hummingbirds beat their wings more than 50 times per second. A scientist is measuring the time it takes for a hummingbird t

Aliun [14]

Answer:

millisecond

Explanation:

Time is measured in seconds in the SI system. The scientist will measure the time it takes to complete one flap of the wings. In the SI system the use of prefix makes it easier to describe the value. It is as follows

$1\ ns=10^{-9}\ s$

$1\ \mu s=10^{-6}\ s$

$1\ ms=10^{-3}\ s$

$1\ cs=10^{-2}\ s$

Here, the wings flap so fast that the millisecond should be used.

5 0

3 years ago

The outside edge of a spinning compact disc is moving at a higher velocity than an inside track on the disc.

Serjik [45]

Answer:

The outside edge of a spinning compact disc moves with a higher velocity than the inner track of the disc.

Explanation:

Here the compact disc undergoes rotational motion about a fixed axis which is its centre in this case. The particles in rotational motion have angular velocity which is given by the equation

ω = ∅/t

Where θ is the angular displacement and t is the time.

The transnational speed of a particle which is in circular motion is given by the equation

v = rω

r is the distance of the point from the rotation centre

The transnational speed of the particles is merely determined by their distance from the centre in this case. It is due to the equality of angular velocity of all the points.

The distance of the outer edge of the compact disc from its rotational centre is larger than the distance of inner edge from the rotational centre. Thus the farther edge of a spinning disc moves faster than the nearer edge.

6 0

3 years ago

Read 2 more answers

A physicist attempts to use Newton's laws of motion to predict the behavior of a molecule of water, but the laws fail to give ac

adell [148]

Answer:

B) The molecule is small enough so that quantum effects are important.

Explanation:

The molecules of water behave like wave and their motion cannot be accurately predicted by classical physics laws but can be properly predicted by quantum theory.

Classical physics describes matter that behave like solid particles while quantum effect describes matter that behaves like waves.

Therefore, the correct option is B.

6 0

3 years ago