Besides temperature, the factor that is important for conduction, convection, and thermal radiation isa. thermal conductivity.
b. wind speed.
c. emissivity.
d. surface area.
e. thermal gradient.
Answers
Option a. Apart from temperature, the factor that is important for conduction, convection, and thermal radiation is thermal conductivity.
Thermal conductivity is the property of a material to conduct or transfer heat. The thermal conductivity of a material defines its ability to transport thermal energy through it. It is represented by the symbol "k" and measured in watts per meter per degree Kelvin (W/m K).
Conduction is the method of transferring heat through a substance or from one object to another. This transfer occurs through the movement of energy from one molecule to the next in the substance. Conduction happens most often in solids since liquids and gases are terrible conductors of heat.
Convection is the transfer of heat through the movement of heated matter. The movement of matter may be in the form of currents in fluids (liquids and gases) or by direct mixing in solids (such as magma).Convective heat transfer depends on the motion of matter, which may be natural or forced, and the properties of the matter, such as its thermal conductivity, density, and specific heat.
Thermal radiation is the transfer of energy by electromagnetic waves. It is how the Sun radiates heat to the Earth, and it is also how the Earth radiates energy back into space. All objects emit radiation, which is how we can see them in the dark. The radiation emitted by an object is proportional to its temperature, so hotter objects emit more radiation than cooler ones.
Therefore, the option a is correct.
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Related Questions
Un cuerpo de 480 g de masa es atraído con una fuerza de 3.9 E-6 N por otro cuerpo de 196 g de masa. Calcula la distancia a la que se encuentran.
Answers
Answer:
La distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.
Explanation:
Asumamos que ambos cuerpos son partículas, la fuerza de atracción (\(F\)), en newtons, entre ambos cuerpos se define mediante la Ley de Newton de la Gravitación Universal, cuya ecuación es:
\(F = G \cdot \frac{m_{1}\cdot m_{2}}{r^{2}}\) (1)
Donde:
\(G\) - Constante de la gravitación universal, en metros cúbicos por kilogramo-segundo cuadrado.
\(m_{1}, m_{2}\) - Masas de los cuerpos, en kilogramos.
\(r\) - Distancia entre los cuerpos, en metros.
Si sabemos que \(G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}\), \(m_{1} = 0.48\,kg\), \(m_{2} = 0.196\,kg\) y \(F = 3.9\times 10^{-6}\,N\), entonces la distancia entre los dos cuerpos es:
\(r = \sqrt{\frac{G\cdot m_{1}\cdot m_{2}}{F} }\)
\(r \approx 1.269\times 10^{-3}\,m\)
Es decir, la distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.
From the equation w=mg, it is apparent that weight is equivalent to a (an)
A. force
B. mass
C. acceleration
D. none of these
Answers
According to the given information the correct answer is Based on the equation w=mg, it is apparent that weight is equivalent to a (an) A. force
Force refers to a push or pull that can cause a change in the motion of an object. It is a vector quantity, which means it has both magnitude and direction. Force is typically measured in units of newtons (N).
There are different types of forces, including:
Contact forces - These are forces that arise from physical contact between two objects. Examples include friction, tension, and normal force.
Non-contact forces - These are forces that can act over a distance without physical contact between objects. Examples include gravity, electric and magnetic forces.
Applied forces - These are forces that are exerted by an external agent, such as a person pushing a cart or a machine pulling a rope.
Reactive forces - These are forces that are exerted in response to an applied force, such as the force that a floor exerts on a person standing on it.
Forces are an important concept in physics, as they help explain how objects move and interact with one another.
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Imagine you inherit a farm and now have to purchase fertilizer for the farm. The farm is 340 acres and had corn planted the previous year. You must add fertilizer to the soil before you plant this year's crop. You go to the local fertilizer store and find SuperPhosphate-brand fertilizer. You read the fertilizer bag and can recognize from your high school chemistry class a molecular formula C*a_{3}*P_{2}*H_{14}*S_{2}*O_{21} (you don't understand anything else written on the bag because it is imported fertilizer from Japan). You must decide how much fertilizer to buy for application to your cornfields. If each bag contains 25 kg of fertilizer and costs $54.73, how many bags of fertilizer must you purchase, and how much will it cost you to add the necessary fertilizer to your fields ?
Answers
Total Cost is = $107,380 if The farm is 340 acres and had corn planted add fertilizer to the soil before you plant this years' crop.
What is called fertilizer?A fertiliser is a natural or artificial substance containing chemical elements (such as Nitrogen (N), Phosphorus (P) and Potassium (K)) that improve growth and productiveness of plants. Some synonyms include the terms "enrichment" or "plant nutrient".
Why is fertilizer important?Without fertilizers, nature struggles to replenish the nutrients in the soil. When crops are harvested, important nutrients are removed from the soil, because they follow the crop and end up at the dinner table. If the soil is not replenished with nutrients through fertilizing, crop yields will deteriorate over time.
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I will give BRAINLIEST.... ln the diagram below the system is in equilibrium. Determine the value of F1 in Newton
Answers
Answer:
35N
Explanation:
if its balanced both sides would have equal forces. Left side is 35N and right side is 70N. 70-35=35N
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puck 1 is moving 10 m/s to the left and puck 2 is moving 8 m/s to the right. they have the same mass, m.
Answers
If the two pucks, which have the same mass, are moving towards each other, the speed and direction of their movements can be used to calculate the final velocity of both pucks.The law of conservation of momentum states that the momentum of an isolated system remains constant if no external forces act on it.
The momentum before the collision is equal to the momentum after the collision in an isolated system.Considering the given values, if Puck 1 is moving to the left at 10 m/s and Puck 2 is moving to the right at 8 m/s, their velocities are opposite. Therefore, they are moving towards each other.When two pucks with the same mass collide, their velocities and momenta are conserved. If both pucks stick together after the collision, their final velocity can be calculated using the following equation:m1u1+m2u2=(m1+m2)vwhere m1, u1, m2, and u2 are the masses and initial velocities of the pucks, and v is their final velocity.
The final velocity of the combined pucks can be found by dividing the total momentum by their combined mass, which is given by:v = (m1u1 + m2u2) / (m1 + m2)In this case, the momentum of Puck 1 is:momentum1 = m x v1where v1 = -10 m/s (because Puck 1 is moving to the left)Similarly, the momentum of Puck 2 is:momentum2 = m x v2where v2 = 8 m/s (because Puck 2 is moving to the right)
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What if? what would be the change in electric potential energy (in j) of the system if the charge q were moved a distance d
Answers
The change in electric potential energy depends on the initial and final positions of the charge, as well as the electric field that exists between those positions.
The change in electric potential energy (ΔU) of a system when a charge q is moved a distance d in an electric field depends on the strength of the field and the magnitude and direction of the charge.
The formula for calculating the change in electric potential energy is:
\(\triangle U = q * E * d cos\theta\)
where q is the magnitude of the charge, E is the strength of the electric field, d is the distance the charge is moved, and θ is the angle between the direction of the field and the direction of the movement of the charge.
If the charge q is positive and is moved in the direction of the electric field, then θ = 0 and cos(θ) = 1, and the formula simplifies to:
\(\triangle U = q * E * d\)
If the charge q is negative and is moved in the direction of the electric field, then θ = 180 degrees and cos(θ) = -1, and the formula becomes:
\(\triangle U = -q * E * d\)
If the charge is moved perpendicular to the electric field, then θ = 90 degrees and cos(θ) = 0, and the change in electric potential energy is zero.
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Which source of energy is used in a nuclear power station to generate electrical energy
Answers
Steam is produced when the cooling agent is heated by nuclear fusion. Turbines, or wheels turned by a flowing current, are rotated by the steam. The generators, which are engines that produce power, are driven by the turbines. Above process is followed in a nuclear power station to generate electrical energy.
Electrical energy is the energy that emerges from the kinetic or potential energy of charged particles. It is referred to be energy that has undergone transformation from overall electric potential energy.
Electrical energy can be described as the result of electrons travelling between two points. The movement of charged particles along or through a medium is known as electricity or current (like a wire).
The basic unit of electrical energy is the joule, also referred to as a watt-second. One joule of electrical energy is produced when one amp of current flows through a circuit for one second while a potential difference of one volt is applied across it.
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what are the two purposes of heat fixation?
Answers
Those are the two purposes, hope this helps have an excellent day!
John is rollerblading down a long, straight path. At time zero, there is a mailbox about 1 m in front of him. In the 5 s time period that follows, John's velocity is given by the velocity versus time graph in the figure. Taking the mailbox to mark the zero location, with positions beyond the mailbox as positive, plot his position versus time in the given position versus time graph. Assuming that all the numbers given are exact, what is John's position at a time of 4.35 s? Enter your answer to at least three significant digits. Assuming that all the numbers given are exact, what is John's position at a time of 4.35 s? Enter your answer to at least three significant digits.
Answers
The position of John at time of 4.35 s is -1.13 m
From the given chart;
at time, t = 0, the initial velocity, u = - 2 m/sat time, t = 5 s, the final velocity, v = 2 m/sThe average acceleration is calculated as follows;
\(acceleration = \frac{\Delta \ velocity}{\Delta \ time} \\\\acceleration = \frac{v- u}{t_2 - t_1} = \frac{2 - (-2)}{5 - 0} = \frac{4}{5} = 0.8 \ m/s^2\)The position of John at time, t = 4.35 s is calculated as follows;
\(x(t) = ut + \frac{1}{2} at^2\\\\x(4.35) = (-2 \times 4.35) \ + \ 0.5\times 0.8\times( 4.35)^2\\\\x(4.35) = -8.7 \ + \ \ 7.569\\\\x(4.35) = - 1.13 \ m\)
Thus, the position of John at time of 4.35 s is -1.13 m
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Skateboard A Force: 33 N Time: 0. 12 s Skateboard B Force: 33 N Time: 0. 57 s Skateboard C Force: 33 N Time: 0. 78 s Which skateboard has the greatest impulse?.
Answers
The skateboard that has the greatest impulse is Skateboard C (Impulse = 25.74 Ns)
From the question,
We are to determine which skateboard has the greatest impulse. To do this, we will calculate the impulse of each skate board.
Impulse can be calculated by using the formula
I = Ft
Where I is the impulse
F is the force
and t is the time
For Skateboard AForce = 33 N
Time = 0. 12 s
∴ Impulse = 33 × 0.12
Impulse = 3.96 Ns
For Skateboard BForce = 33 N
Time = 0. 57 s
∴ Impulse = 33 × 0.57
Impulse = 18.81 Ns
For Skateboard CForce = 33 N
Time = 0. 78 s
∴ Impulse = 33 × 0.78
Impulse = 25.74 Ns
Hence, the skateboard that has the greatest impulse is Skateboard C (Impulse = 25.74 Ns)
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Answer:
Skateboard C has the greatest impulse of the three.
Explanation:
Which of the following was not a main idea of Dalton's atomic theory?
1. Compounds contain atoms of more than one element.
2. There are four elements that make up matter: air, water, fire, and earth.
3. All atoms of the same element have the same mass, while atoms of different elements have different masses.
4. All matter is composed of atoms.
Answers
Answer:
1 IS CORRECT
Explanation:
A balloon is rubbed against a sweater. Which of the following describes the result of this interaction?(1 point)
The outer shell electrons move from the balloon to the sweater.
The fibers of the sweater lose electrons.
The balloon becomes positively charged.
The free electrons in the balloon decreases.
Answers
Fibers of the sweater lose electrons because electrons are leave it.
One of the ways of charging a body is by friction. Charges are transferred from one body to another when an object is rubbed against another. This is charging by friction.
A sweater has negative charges hence when the balloon is rubbed against the sweater, fibers of the sweater lose electrons because electrons are leave it.
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Use the diagram and the drop-down menu to answer the question.
If bulb C burns out, what will happen to bulbs A and B
Answers
Answer: They both will go out
Explanation:
a vector points 12.0 units along the x-axis and 9.00 units along the y-axis. find the magnitude of the vector
Answers
Explanation:
R = \(\sqrt{(12.0)^{2} + (9.00)^{2}}\) = 15 UNIDADES
Which nutrient is easily broken down and converted to glucose for energy use in the body?
Answers
Answer:
Explanation:
The body uses three main nutrients to function— carbohydrate, protein, and fat. These nutrients are digested into simpler compounds. Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids.
Answer:
its carbohydrates she didnt list the answer i did and i was the one asking the question well theirs the answer had to figure it out my self
Explanation:
Three forces act on an object at the same time. F1 = 100. N at 30.0degrees north of east, F2 = 200. N at 45.0degrees north of west, and F3 = 100. N at 30.0degrees east of south. What are the magnitudes and direction of both the resultant force and equilibrant force?
Answers
200N towards south are the magnitudes and direction of both the resultant force and equilibrant force.
Define force
A force is an effect that changes, or accelerates, the motion of a mass-containing object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.
The entire force operating on the item or body, combined with the body's direction, is referred to as the resultant force. When the object is stationary or moving at the same speed as the object, the resultant force is zero.
Between F1 and F2 , resultant force will be 100N towards 45.0degrees north of west,
The total resultant force will be 100+100 i.e. 200N towards south.
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A body weighing 108N moves with speed of 5m/s in a horizontal
circular of radius 5m.Calculate the magnitude of the:
(i)centripetal acceleration (ii) Centripetal force (iii) centrifugal
force
Answers
Answer:
i) 5 \(m\)/\(s^{2}\) ii) 54 \(N\) iii) 54 \(N\)
Explanation:
i) \(a = \frac{v^{2}}{r}\) ⇒ \(a\) = 5² ÷ 5 = 5 \(m/s^{2}\)
ii) \(m = \frac{W}{g}\) ⇒ \(m\) = 108 ÷ 10 = 10.8 \(kg\) , \(F = ma\) ⇒ \(F =\) 10.8 × 5 = 54 \(N\)
iii) F1 = F2 = 54 \(N\)
Which of the following BEST describes a comet?
Answers
A comet is a celestial object primarily composed of ice, dust, rock, and other organic compounds. It typically has a nucleus, which is a solid core surrounded by a coma—a glowing, gaseous envelope—and often exhibits a tail that points away from the Sun due to solar radiation pressure. Comets generally follow elongated orbits around the Sun and can occasionally be visible from Earth during their close approaches.\(\huge{\mathcal{\colorbox{black}{\textcolor{lime}{\textsf{I hope this helps !}}}}}\)
♥️ \(\large{\textcolor{red}{\underline{\texttt{SUMIT ROY (:}}}}\)
Recoil is noticeable if we throw a heavy ball while standing on roller skates. If instead we go through the motions of throwing the ball but hold onto it, our net recoil will be?.
Answers
Answer:
zero
Explanation:
When a transformer is step down then
A. Vs<Vp
B. Vs>Vp
C. Vs = Vp
D. Np< NS
Answers
Answer:
Hey!
Your answer should be D!
Explanation:
In a transformer Np / Ns is called the voltage ratio. If Ns is less than Np then Vs is less than Vp. This is called a step-down transformer as the voltage is reduced.
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High tide from Moon's pull on
oceans
High tide from Moon's pull on
solid ground
Low tide ahead of Moon's
orbit
Low tide behind Moon's orbit
3
TE
Label the diagram with descriptions of the tides at each location.
Sign out
ES
Feb 2
8:
PLEASE HURRY
Answers
I'm sorry but I don't know
High tide from Moon's pull on oceans
Low tide ahead of Moon's orbit
High tide from Moon's pull on solid ground
Low tide behind Moon's orbit
If the particles that make up an object begin to move quickly, their average kinetic energy _____ and the object's temperature _____. Group of answer choices
Answers
Explanation:
If the particles that make up an object begin to move quickly, their average kinetic energy increases the object's temperature rises. Group of answer choices
A ball thrown horizontally from the top of a building 24 m above the ground strikes the ground at the distance of 18 m from the base of the building. What was its initial velocity? (Use g = 10 m/s2.)
Answers
The initial velocity of the ball thrown from the top of a building is 13.29 m/s.
What is projectile?When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion is called projectile.
A ball thrown horizontally from the top of a building 24 m above the ground strikes the ground at the distance of 18 m from the base of the building.
Range of a projectile is given by
R = u²sin2θ /g
where θ =0°, g =9.81 m/s²
Put the values, we get
18 = u² /9.81
u = 13.29 m/s
Thus, the initial velocity is 13.29 m/s.
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system does 184 J of work on its environment and gains 73.0 J of heat in the process. Find the change in the internal energy of the system. Include the algebraic sign in your answer (+ or −)
Answers
The change in internal energy of the system is +257.0 J (positive because the system gained energy).
The change in the internal energy of the system can be calculated using the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.
Change in internal energy = Q - W
where Q is the heat added to the system and W is the work done by the system.
Given that the system does 184 J of work on its environment and gains 73.0 J of heat in the process, we have:
Q = 73.0 J (heat added to the system)
W = -184 J (work done by the system)
Note that work done by the system is negative since it involves energy leaving the system.
Substituting the values into the formula above, we have:
Change in internal energy = Q - W
= 73.0 J - (-184 J)
= 73.0 J + 184 J
= 257.0 J
Therefore, the change in internal energy of the system is +257.0 J (positive because the system gained energy).
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An inductor has a 46.0 reactance at 60.0 hz. what will be the maximum current if this inductor is connected to a 50.0 hz source that produces a 105 v rms voltage?
Answers
The maximum current if this inductor is connected to a 50.0 hertz source that produces a 105 v rms voltage is 3.87A
X= ωl
where,
X is inductive reactance
ω is thee angular frequency
L is the inductance
therefore,
46= 2π60.L eq-1
and
X° is inductive reactance when 50 hz source is used
X°=2π50.L eq-2
dividing eq 2 by eq 1 we get
X°=38.33 Ω
maximum current (I°) = maximum voltage divided by inductive reactance
I°=√2Vrms/38.33
I°=3.87A
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NEED HELP REALLY QUICK PLEASE !
If a load is raised through a distance of 5 meters in 5 seconds, calculate the efficiency?
Answers
The efficiency of the machine will be calculated from the ratio of output force to input force.
What is efficiency?
Efficiency is defined as the rate at which a machine does work.
Mathematically, efficiency is given as the ratio of output force to input force.
Eff = (output force / input force) x 100%
Eff = (load x distance moved by load) / (effort x distance moved by effort)
Thus, the efficiency of the machine will be calculated from the ratio of output force to input force.
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In a Young's double-slit experiment, a thin sheet of mica is placed over one of the two slits. As a result, the center of the fringe pattern (on the screen) shifts so that the center is now occupied by what was the 30th dark band. The wavelength of the light in this experiment is 480 nm and the index of the mica is 1.60. The mica thickness is:
Answers
The mica thickness will be 24 * \(10^{-6}\) m
Diffraction of light is the phenomena of bending of light around the corner of an obstacle or aperture in the path of light and this light penetrates into the geometrical shadow of the obstacle. Thus, this light deviates from its linear path.
The central maximum is the brightest central portion of the diffraction pattern. The central maximum is the widest and has the maximum intensity.
Fringe width = lambda * D / d
The distance of the screen from the slit = D
The distance between two slits = d
shift = 30 * lambda * D / d equation 1
shift in central maxima = (mu - 1)t D / d equation 2
equating both the equations
(mu - 1) t D / d = 30 * lambda * D / d
(1.60 - 1) * t = 30 * 480 * \(10^{-9}\)
t = 24 * \(10^{-6}\) m
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A football team is practicing outdoors in June. The temperature is 85ºF, and the relative humidity is 60 percent. It is 2:00 p.m., and the day is bright and sunny. What is the maximum amount of equipment that the players are allowed to wear? List the equipment by name. What is the minimum frequency of breaks that the players must be granted to drink fluids?
Answers
The maximum amount of equipment that the players can wear shorts only.
The minimum frequency of breaks that the players must be granted to drink fluids is 20 minutes.
What is relative humidity?In Science and Physics, relative humidity can be defined as the amount of moisture that is found in the atmosphere in comparison with the amount of air that it can hold at a specific temperature.
Generally speaking, there would be precipitation, cloud, or fog without humidity. In this context, we can logically deduce that the players can wear shorts only, without wearing pads, helmets, and long pants.
Since the time is 2:00 PM, temperature is 85ºF and the relative humidity is 60 percent, it is very important that the players be granted opportunity to drink fluids every 20 minutes.
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Please help me out someone?
A positive test charge is placed between an electron, e, and a proton, p, as
shown in the diagram below. When the test charge is released, it will move
toward
Answers
When test charge is released, the charge will move towards the electron placed at point D.
What is charge?The charge is the physical quantity that attracts or repels the other objects when comes into electric field.
The test charge is positive charge. The like charges repel each other and unlike charges attract each other.
So, when test charge is released, it gets attracted towards the opposite charge i.e. electron which is negatively charged.
Thus, the correct answer is D.
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What is the biggest animal on land?
Answers
Answer:
elephant
Explanation:
Answer:
elephant
Explanation: