If you want money get a job instead of being lazy cuz you gone have to get one sooner or later or your not going anywhere in life
Here the answer choices that accompany this question:
- Heat energy from the fire was radiated through the air to the candle
- Heat energy from the fire was conducted through the table to the candle
- Heat energy from the fire reached the candle by convection
- Heat energy from the fire was conducted through the air into the candle.
Answer:
- Heat energy from the fire was radiated through the air to the candle
Explanation:
Heat energy is transferred from hot sources to colder substances by any of three mechanisms: <em>conduction, convection, or radiation.</em>
<em>Conduction</em> only happens by direct contact of the objects because it relies of the transfer of kinetic energy by the vibration of the particles (atoms or molecules). Then this mechanism is not responsible of the melting of the candle which is to some distance of the fire. Hence, the second and the fourth choices are not correct.
<em>Convection</em> happens by the movement of fluids (liquids or gases): the liquids or gases when move carry on heat. The particles travel and carry on heat energy with them transfering heat from the hotter substance to the colder one. Fire does not move from the fireplace to the table where the candle is, hence the third option is also incorrect.
<em>Radiation</em> is the transfer of heat energy by electromagnetic waves. Electromagnetic waves do not require a physical medium to travel. Radiaton is a typical form of heat transfer from very hot objcets. Since fire is at a very high temperature, radiation heat transfer occurs to an important degree and is responsible for melting the candle. Hence, the first choice is correct.
Books can be carried to school without changing the kinetic or potential energy of the books or doing any work: by moving the book without acceleration and keeping the height of the book constant.
<h3>What is potential energy?</h3>
Potential energy can be defined as a type of energy possessed by an object due to its height above the Earth.
In Science, the potential energy and the work done by an object such as a book is highly dependent on its height or position.
<h3>What is kinetic energy?</h3>
Kinetic energy can be defined as a type of energy possessed by an object due to its motion or change in velocity (acceleration).
This ultimately implies that, an object in motion or with an acceleration would possess kinetic energy.
In conclusion, books can only be carried to school without changing the kinetic or potential energy of the books or doing any work when they are moved without acceleration (velocity is constant) and their height is kept constant.
Read more on potential energy here: brainly.com/question/1242059
The sin(4π/5) must be positive since 0 < 4π/5 < π. So C is the only approximate value.
<h3>What is
trigonometric series?</h3>
A trigonometric series is convergent to a function f(x) on the interval [0,2π ]which is identically zero or nonzero at most points, then the coefficients of the series are all zero.
The first five terms in the series expansion of sin(x) are
sin(x) ≈ x - x ³/3! + x ⁵/5! - x ⁷/7! + x ⁹/9!
Now let x = 4π/5:
sin(4π/5) ≈ 0.5884
Thus, approximate value of trigonometric series to four decimal places is 0.5884.
Learn more about trigonometric series.
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The major way the repetition of the <em>words cruel and cruelty </em>affect the tone of the paragraph is:
- C. It creates a matter-of-fact tone as machiavelli demonstrates the positive effects of a ruler’s cruelty
<h3>Repetition</h3>
This refers to the continued usage of a word, phrase or sentence, usually to create dramatic effect among readers so that a point can be emphasized.
From the complete text, we can see that Machiavelli made use of repetition so that he can show the positive effects of the rulers' cruelty.
Therefore, the correct answer is option C
Read more about repetition here:
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