Questions 37,72 and 66 correction on 2016 chemistry entrance Answer
ฝัง
- เผยแพร่เมื่อ 16 ก.ย. 2024
- This video is perfect for anyone interested in education, whether you’re a student, teacher, parent, or simply someone who wants to understand the complexities of the education system. By the end of this video, you’ll have a better understanding of the world of education and its significance in our lives.
So, if you’re curious about education and want to learn more, please subscribe to our channel and hit the play button. Let’s explore the world of education together!
Educational videos, Learn with us, Educational content, Educational tutorials, Educational guides, Educational explanations, Educational discussions, Educational debates, Educational interviews, Educational Q&A.@essentialedu2
Being corrosive implies chemical behaviour.
speed of electromagnetic wave is constant you are correct but it depend on the nature of medium because speed of light in the vacuum is constant and in other place is not constant so A is correct
Is light require medium?? No
Bro speed of light is constant for all.
Please check this out.The speed of emr is medium dependent. It is constant in vaccum.
Thanks@@dani-ik2sw
c=frequency .wavelength አይደል
72 b is the correct choice
- B. Nitric acid has a pungent smell. (This describes a physical property, as it relates to the senses.)
- C. Nitric acid is a corrosive chemical. (This describes a chemical property, as it relates to its ability to react with other materials.)
Teacher on question 37, the emr speed of light is constant this is because for example from gamma ray to radio wave the wavelength is increase and the frequency is decreases, so because of wavelength c is increase at the same time because of frequency it decrease, so it doesn't change . But the speed of light is change it travels from one medium to another medium. This is because the refractive index of the material. For example light travels from air to water it's speed decrease , because water has high refractive index , and because of this it's wavelength decrease and also it's speed. And teacher you can't see that speed of light is directly proportional to both wavelength and frequency . C=wavelength x frequency and text book also indicated that the speed of emr is depend on the medium which it travel through .
On question 72, the corrosiveness of the nitric acid is because of it's strong oxidizing agent. So it is definetly chemical property. So the correct answer is the nitric acid has pungent smell. And also teacher you can't stand to opposite side of the text book , because the question is asked based on the text book.
light(photon) is electromagnetic wave/ don,t use Al bro but 72 questions tends to be B as answer
Q43 eko valance number altegletsem
Sp3d2 mndn new
Q48. demo more product new produce yemihonew slezi equilibrium ley reach lemareg gd reverse rxn mehon alebet
Teacher if you want you can check it on Physics G-10,U-6 old curriculum we know light is one of EMR as light travels from one medium to another there is refraction of light and this leads to change in speed of light. According to Snell's law SinQ1/SinQ2=n2/n1=V1/V2.So "A" is the correct answer🙏
q37. the answer is A
All EM waves travel at c in a vacuum. But, in any other medium, the speed of an EM wave depends on frequency.
choice A is correct because it just states out the relationship b/n c & f
choice B is not correct because it's stating the r/ship b/n c & wavelength and there're directly proportional. during questions like this we can't overthink that when wavelength increases.... it's unnecessary to compare the change in third quantity when comparing who of the eqn b/se we're taking the third one as constant in the comparison, this happens always when stating r/ship b/n quantities if u notice.
choice C is plain wrong.
choice D is wrong since we're talking about the speed not about the nature of the EM wave. the speed depends on medium, if u didn't get that think about why c is called speed of light in "VACCUM" why not in other medium based things. so All EM waves travel at c in a vacuum. But, in any other medium, the speed of an EM wave depends on frequency.
What about B
Light not require medium ,travel in vacuum
Al answer is not correct ,bro
@@Essentialedu2 choice B is not correct because it's stating the r/ship b/n c & wavelength and there're directly proportional. during questions like this we can't overthink that when wavelength increases.... it's unnecessary to compare the change in third quantity when comparing who of the eqn b/se we're taking the third one as constant in the comparison, this happens always when stating r/ship b/n quantities if u notice.
@@Essentialedu2 choice B ; let me ask a question . what happens to momentum when mass increases ? is it the same ? or increase decrease ? it definetly increases; however as of ur understanding when mass increases velocity decreases so......... I think it doesn't work like that we're comparing two quantities always by taking the thrid one as a constant otherwise the're all cpd r/ships we can't always get the right r/ship.
so in this case B is wrong
37 absolutely D without question.
q72. Corrosion is chemical property too, cause it result in formation of new subs. + pungent smell means acrid. HNO3's odor is stated as pungent/acrid/sharp. they are all synonyms as of I know.
Corrosive not corrosion
@@Essentialedu2 what is the d/ce? I mean corrosive is the chemical while the process is corrosion.
I will send u word by word what corrosive mean from goggle " corrosive substance is able to destroy solid materials by a chemical reaction"
is speed or frequency constant? and if the speed is constant why n is needed in refraction?
constant yemiyonew be vacuum wust travel bemiyadergu seat new. for more information see(grade 11 old text book page 60)
The speed of electromagnetic wave depends on the nature of the medium through which the wave is travelling.
I need more clarification. tnx
what is the difference between Choice A and B, no answer based on your idea
An electromagnetic wave does not need a medium. In the vacuum version of the Maxwell equations, no medium occurs. ε0,μ0, the vacuum permittivity and permeability do not describe electric or magnetic properties of a medium
betam gobezzz
@@Essentialedu2 in fact electromagnetic wave doesn't need a medium to travel but it doesn't necessarily mean that they don't travel through the medium. they also travel in a medium for example in solid, air and others. when they travel in a vacuum they achieve maximum(highest ) speed that is 3×10^8 m/s but when they travel in a medium, their speed highly depends on the nature of the medium through which they travel.
thank you teacher
Q72 . directly tetsifo ale grade 12 chemistr nitric acid lay pungent smell bilo corrosion chemical property e.g iron
37. Degmo simple eko new c=vh so directly proportional new grade 11 unit 2 lay electromagnetic radiation lay ale eko
Not corrosion is corrosive
@@Essentialedu2if you don't believe please check grade 12 chemistry page 152 about properties of nitric acid line 2 and check the word corrosion(it's noun)and corrosive(it's adjective)on dictionary
@@Essentialedu2for q37 check grade 11 chemistry unit 2/old curriculum/ page 60 line 4 to line 13
SPeed of light is constant in vacuum but not in medium
Is light require medium to travel?
Speed: Electromagnetic radiation always travels at the same speed in a vacuum, which is the speed of light, approximately 299,792,458 meters per second (m/s). However, in other materials, such as air or water, the speed of electromagnetic radiation can be slower.
No ,that is speed light
The speed of electromagnetic wave depends on the nature of the medium which the wave is traveling
Is speed of light depends on medium kkk
Zendro remidan ynoral end
No more explanation...37,A 72,B and 66, C it's clear.
For you
@@Essentialedu2 not only for me but also for those who learnt each grades text book clearly...by the way you're one of my best teachers who helped me on my entrance preparation...much respect and love ❤🙏
Ere 72 eko mnm ayakerakrm melsu B nw
Corrosive this is chemical property
Yes
37, chemistry grade 11 textbook medium dependent new ylal unit 2 emr lay
An electromagnetic wave does not need a medium. In the vacuum version of the Maxwell equations, no medium occurs. ε0,μ0, the vacuum permittivity and permeability do not describe electric or magnetic properties of a medium
Mesafun check arg pg 60 grade 11
An electromagnetic wave does not need a medium. In the vacuum version of the Maxwell equations, no medium occurs. ε0,μ0, the vacuum permittivity and permeability do not describe electric or magnetic properties of a medium
Check on grade 11 unit 2 phage 60
no more questions (what is the difference b/n choice A and B,you have to know the relationship b/n frequency and wave length.you don't know -
37 gn teacher bzu search adereku melsu pungent smell eyalegn new😢
72 ,is the odur of nitriv acid is acrid yes search it
@@Essentialedu2 esh teacherye
Brother speed of light constant yemihonew iko in vacuum new
Yes light only move through vacuum or not require medium
@@Essentialedu2 even if medium bayasfeligewim speedun affect yaregewal bekelalu lemeredat physics optics lay iyew refraction concept lay indet medium affect indemiyadergew
Teacher 4ኛ ጥያቄ CCl4 non _polar አይደሌም እንዴ?
But it contain polar bond
no 4 መልስ ምንድነዉ?
Which one of the following is peroxide ? yemilew tiyake melsu CaO2 bihonim be ene tiyake lay gin CaO bicha new yemilew ስለዚህ ምን መደረግ አለበት
@@AbenetAbera-m7p okay the questions is not correct
aw booklet 196 cao bcha new yemilew ahun be 1 mark bnwedqs