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olganol [36]
3 years ago
5

Which best describes how the diagram illustrates both laws of thermodynamics?

Physics
2 answers:
Mama L [17]3 years ago
6 0

First law of thermodynamics is based on conservation of energy that states that energy can never be destroyed, it changes from one form to other form of energy. As in the given image, boiler gives thermal energy in the form of steam and this thermal energy do work on turbine by rotating it.

Second law of thermodynamics states that heat energy always moves from high temperature region to low temperature region until no external energy is given. As in the given image, boiler have high temperature steam and turbine is low temperature region. Therefore, high temperature stream moves from lower area to the turbine.

Hence correct answer -

First law: Thermal energy is used to do work on the turbines.

Second law: High-temperature steam flows to an area of lower temperatures in the turbines.

tigry1 [53]3 years ago
5 0

Answer:

The correct anwer is B First law: Thermal energy is used to do work on the turbines.

Second law: High-temperature steam flows to an area of lower temperatures in the turbines.

Explanation:

Just took the test!!

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The speed of sound in air is 345 m/s. A tuning fork vibrates above the open end of a sound resonance tube. If sound waves have w
anzhelika [568]

Answer:

594.8 Hz

Explanation:

Parameters given:

Speed of sound, v = 345 m/s

Wavelength = 58 cm = 0.58 m

Speed of a wave is given as:

Speed = wavelength * frequency

Therefore:

Frequency = Speed/Wavelength

Frequency = 345/0.58

Frequency = 594.8 Hz

8 0
3 years ago
Plants absorb WHAT from the atmosphere and release WHAT to the atmosphere.
makvit [3.9K]
Plants absorb water and release o2
6 0
3 years ago
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How much work is needed to stretch this spring a distance of 5. 0 cm , starting with it unstretched?
densk [106]

The work done by the unstretched spring is 5 J.

<h3>What is the Hooke's law?</h3>

Hooke's law states that the extension of a given material is directly proportional to the force applied as log as the elastic limit is not exceeded. Thus we have to know that; F = Ke

F = force applied

K = force constant

e = extension

Using the graph;

K = F/e

F = 200N

e = 5 cm or 5 * 10^-2 m

K = 200N/ 5 * 10^-2 m

K = 4000 N/m

Now;

Work = 1/2Ke^2

Work = 0.5 *  4000 N/m * (5 * 10^-2 m)^2

Work = 5 J

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6 0
2 years ago
The Curiosity rover now on Mars analyzed rocks and found magnesium to have the following isotopic composition.
emmasim [6.3K]

Answer:

A.   number of neutrons of Magnesium Mg = 13

B.   The average mass of Mg = 22.29 amu

C.   the magnesium composition on Mars is not the same as that on Earth.

Explanation:

Isotopes are atoms with the same atomic number but different mass number. This is due to the difference in mass of the neutrons.

The atomic number of Magnesium Mg = 12

The atomic number of an element is the number of protons present in the atomic nucleus of the element

i.e Atomic number = number of protons = 12

The mass number of an element is the sum of the protons and neutrons in the atomic nucleus of the element.

Mass number = number of protons + number of neutrons

Given that the mass number of Mg = 25

Then;

25 = 12 + number of neutrons

25 - 12 = number of neutrons

13 = number of neutrons

number of neutrons of Magnesium Mg = 13

B. What is the average atomic mass of magnesium in these rocks?

The average atomic mass of an element which exhibit isotopy is the average mass of its various isotopes as they occur naturally in any quantity of the element.

Therefore the average atomic mass of magnesium can be calculated as:

= \mathtt{\dfrac{(23.9872 \times 79.70) + ( 24.9886 \times  10.13) + (25.9846 \times  10.17) }{79.7 + 10.13 +10.17}}

= \mathtt{\dfrac{(1911.77984) + ( 53.134518) + (264.263382) }{100}}

= \mathtt{\dfrac{2229.17774 }{100}}

The average mass of Mg = 22.29 amu

C. Is the magnesium composition on Mars the same as that on Earth? Explain.

The average atomic weight of magnesium on Earth is said to be 24.305 amu while that of Mars is 22.29 amu.

There difference in the average atomic weight result into difference in their composition. Therefore,the magnesium composition on Mars is not the same as that on Earth.

7 0
3 years ago
If released, the chemical potential energy will cause the coal atoms and molecules to vibrate violently, and this internal kinet
nata0808 [166]

Answer:

A. burn the coal

Explanation:

Burning the coal is only the way to convert the stored chemical energy of the coal into the the kinetic energy of its molecules that can then be transferred to the nearby objects in the form of heat by the various modes of heat transfer such as conduction, convection or radiation.

Conduction is the contact method of heat transfer in which the adjacent atom transfers the vibration kinetic energy.

Convection is the bulk mode of heat transfer in which the bulk mass of molecules moves near and far to the heat source.

Radiation is the distant mode of heat transfer in the form of electromagnetic waves.

5 0
3 years ago
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