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hram777 [196]
1 year ago
6

When you cook a marshmallow on a metal poker tool over an open flame, energy is transferred. Identify the three different ways t

hermal energy is transferred in this situation. Be sure to name the specific places or phenomenon in this system where each of the types of thermal energy transfer is occurring and the direction the energy is being transferred (from what to what).
Physics
1 answer:
ss7ja [257]1 year ago
3 0

When we cook a marshmallow on a metal poker tool over an open flame, there are three ways in which heat energy is transferred: Conduction, convection, and radiation.

<h3>Heat energy transfer</h3>

Heat transfer is the natural transfer of heat from an object with a higher temperature to an object with a lower temperature. Heat transfer can occur in three ways, namely conduction, convection, and  radiation.

  1. Conduction occurs when heat flows from a place with a high temperature to a place with a lower temperature using a fixed heat-conducting medium. Heat transfer from the open flame to the marshmallows via direct fire contact with the marshmallows is an example of conduction.
  2. Convection is the transfer of heat by means of a stream in which the intermediate substance also moves. If the particles move and cause heat to propagate, convection will occur. The hot air rising from the flames burning the marshmallows is an example of convection.
  3. Radiation is heat transfer without a medium. Radiation can also usually be accompanied by light. The direct transfer of heat from the flame to the marshmallow in the form of waves is an example of radiation.

Learn more about heat transfer here: brainly.com/question/16055406

#SPJ4

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Explanation:

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7 0
3 years ago
Which is a characteristics of a physical change?
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8 0
3 years ago
What is the tendency of matter to resist any change in motion?
salantis [7]

Answer: inertia

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6 0
3 years ago
An electron starts from rest in a vacuum, in a region of strong electric field. The electron moves through a potential differenc
Semenov [28]

Answer:

The kinetic energy is  KE  = 5.67*10^{-18} \ J

Explanation:

From the question we are told that

    The potential difference is  \Delta V  =  36 \ volts

       

The potential energy of the end  is mathematically represented as

        PEs  =  - q *  \Delta V

q  is the charge on an electron with a constant value of q =  1.60 *10^{-19} \  C

       substituting values

      PE  =  - 1.60*10^{-19} *  36

      PE  =  -  5.67*10^{- 18} \ J

Now from the law of energy conservation

     The PE_e    =  KEe

Where  KE _e is the potential  energy at the end

 So  

        KE  = 5.67*10^{-18} \ J

The  negative sign is not includes because kinetic energy can not be negative

7 0
3 years ago
You have two golf balls that differ only in their surfaces. one has dimples, while the other is smooth. if you were to drop the
il63 [147K]

Answer: the golf ball with smooth surface would hit the ground first.


Jusitification:


An analysis of forces show two vertical forces acting on the golf balls.


1) one force is the weight (mg) which is vertical downward


2) the other force is the drag force exerted by the air on the golf balls, and it is vertical upward.


3) the drag force opposes the weight, so the acceleration downward is determined by the difference of the weiight and the drag force, until the balls reach the terminal speed (when the drag force equals the weight).


4) the drag force depends on the shape and area of the object falling. Being the surface of one ball smooth implies that the drag force will be less than the one on the other ball.


5) less drag force implies that the terminal velocity of the smooth ball will he higher, ant then it will hit the ground first.

3 0
3 years ago
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