(a) What is the coefficient of static friction between the box and the floor?
Formulae: Frictional force = Coefficient of friction X Normal force F = ma (a) Normal Force of box = 2.3 X g = 2.3 X 9.81 = 22.563N Since net force on box is 0, frictional force = force exerted = 20N Thus, 22.583 = Coefficient of friction X 20 Coefficient = 0.8864 (b) Normal force = 22.563N (a) Net force on box = 0.5 X 2.3 = 1.15N Frictional force = 20 - 1.15 = 18.85N 18.85 = Coefficient of kinetic friction X 22.563N Coefficient = 0.8354
What is the most amazing or shocking thing you know that most people don't?
These are a few things which very few know1.Why should one end of the toothpick is designed to be like this?We can actually use it like this2.This is car …see the black colour flaps in middle of the pictureThey ensure that you are able to shut the cardoors without much effort. How, you ask? Located behind the rear bumper, these devices allow the air to escape from the car when the doors are being closed, preventing overpressure inside the car. Without them, you’d have trouble closing the last door and it will hurt the ear drums3.ANOTHER ONEJames Chadwick who discovered NeutronsWas a student of Ernest Rutherford who discovered Protonswas a student of J. J. Thomson who discovered Electrons.All of them got Nobel Prizes4.This one tooMost of the people use this symbol incorrectly.In general cases, they use this emoticon as a sort of person holding his hands for prayer or to request someone or in Indian terms, doing “NAMASTE”.But, the truth is this symbol stands for 2 people doing a high-five.5.Do you know,A person can develop Green Blood. Something like this-Yup it happens.Sulfhemoglobinemia is a rare condition when a person starts developing green Blood5.Japan police do nothingYes…you heard that right…due to an extremely low crime rate in Japan, Japanese police literally do nothing. On an average, there is less than 1% chance of crime for every 100,000 people in Japan.There was only one incident of murder last year in Japan. Yes just one!6.This one for very useful and impIf you are running out of time,and you have just 15 mins to left for officials or college and u have a 0 percent battery…no problem..put your phone on airplane mode , it will charge at double the speed…most probablyof you will have good amount of battery7.The most important oneIf you want to downlaod anything from any site witout any external downloader here is a trick.Go to that page.Press ctrl+shift+i or right click and select Inspect Element.Select the Network tab and refresh the page & play the video to get content status.You can sort the content by TYPE (tab), to easily get the video link at the bottom under the NAME(tab).Double click the video link. Voila, your download will start.Works fine …Kindly do follow below link for amazing facts about foodhttp://Instragram.com/food_safet...just add "ss" before 'y' in www.youtube.com.Kindly do upvote
What is the NPTEL online exam paper pattern?
NPTEL is a great platform to learn from experienced professors who have worked on the subject and have a good teaching experiences as well. They explain each topic very patiently and clearly. In case you get any doubts you can ask in the forum, but you might not receive response to your doubts as quick as you might think of.I wrote the NPTEL exam this year and i have written it in the previous year as well. The pattern of the paper will depend on the course which you have chosen. The pattern of the questions for the course which i chose last year and this year were different. But the following things were common:Section I : 1 mark questionSection II: 2 mark questionSection III: 5 mark questionThe number of questions in each section will depend on your course and obviously on the professor who is setting up the question paper.My Experience this year and previous year:In the previous year, there were questions from the assignment mostly. But the sad part of the story was that i did not study assignment questions and studied only from my hand written notes, instructor’s notes and the videos as well. So i ended up sitting in the examination hall for a longer period of time as i had to analyze the codes given in the question and solve the numericals for some of them. 3 hrs of time was still more than enough for me to finish the paper.Whereas this year, NPTEL had a surprise for me:NO QUESTIONS FROM ASSIGNMENT. ( Except 2 to 3 questions )But here comes the good part of the story. Luckily this time also i studied from my hand written notes, instructor’s notes and the videos . So i was pretty comfortable with the questions. But yes, i had to think a lot to conclude to a solution this time as compared to last year.So the bottom line is , study thoroughly from the video and understand each and every concept they explain. You can skip the instructor’s notes but not the content in the video. So i would suggest you to make notes parallelly to watching videos. This will save a lot of time a day before the examination.Good Luck!!
What is the chemical name of water?
Well the naming of covalent compounds rules applies. Water is made from hydrogen and oxygen, two nonmetals.The first element listed gets a prefix di- since there are two hydrogens in H2O. So the first part of the name is dihydrogenThe second (and last element) listed will end in the ending -ide. So since there are no more than one oxygen you will just go with oxide.So it’s dihydrogen oxide.NOW… the other way is to have the oxide take the prefix mono- cause there is only one oxygen. So the name becomes dihydrogen monoxide.