Answer:
B) R1 = 6 V and R2 = 6V
Explanation:
In series, both resistors will carry the same current.
that current will be I = V/R = 12 / (10 + 10) = 0.6 A
The voltage drop across each resistor is V = IR = 0.6(10) = 6 V
Answer:
<em>Option D: It iwill actually warm the room</em>
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Explanation:
<u>To complete your given question the available options are:</u>
A. It will cool the room very effectively
B. It will cool the room, but inefficiently
C. It will not change anything
D. It will actually warm the room.
This is a fun and somewhat tricky case. So, let us first understand a few principles in order to answer our question. To begin with<u><em>, the basic operating principle of the fridge is to take the hot air from the surrounding environment and cool it to the desired temperature in order to sustain all products inside the fridge</em></u>. It can also be thought as 'transferring' heat from the interior (i.e. inside the fridge) to the exterior (i.e. outside the fridge and into the surrounding).<em> In fact if you check the back of a fridge during operation, you will noticed a much higher temperature in that area. Which is due to the heat removed by the 'fridge operation system' in order to cool that interior air.</em> Therefore, this heat must transfer somewhere else, which typically ends up on the little fan located on the back of the fridge. We can also think of it in terms of the 2nd Law of Thermodynamics, which essentially tells us that the system (in this case the fridge and its surrounding)<em> MUST reach an Equillibrium.</em>
Therefore, when you do open the door of the fridge, you might initially (and for an instant almost) feel this 'cool' air coming out; thinking the surrounding air should soon cool down as well. But, due to our discussion above along with the principles of the 2nd Law of Thermodynamics, and considering the fridge operation over time,<em><u> the more cool air the fridge looses, the more the fridge system works to cool the air, thus the more the fans of the fridge work, which results to increasing heat getting 'dumped' by the fridge system and thus to the surrounding. </u></em>
<em></em>
<em>Consequently when you open the fridge door you will actually warm the room. (i.e. Option D). </em>
<h3><u>Answer;</u></h3>
C) Covalent bonds are generally weaker than ionic bonds because they overlap electrons to fill their outer shell.
<h3><u>Explanation;</u></h3>
- <em><u>Covalent bond is a type of bond that results from the sharing of electrons between two non-metal atoms. </u></em>
- <em><u>Ionic bond on the other is a type of bond that results from the transfer of electrons between metal atoms and non metal atoms, where a metal atom looses electrons and a non-metal atom gains electrons.</u></em>
- <em><u>The amount of energy required to break an given bond determines how strong a particular bond is.</u></em> Ionic bonds require more energy to break as compared to covalent bond and therefore they are stronger than the covalent bonds.
Answer: D. Transmission
Explanation:
A body is considered opaque to radiation (generally thermal radiation) when its thermal transmittance (the amount of energy that passes through the body per unit of time) is null or zero.
In this sense, when an opaque body is placed in front of a light source, it is illuminated, there will be reflection and absorption of light, but not transmission.
Answer:
The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.
Explanation: