hello my dear pasang la ella already ah wanna come wanna come my dear boys and girls super super so karasiya number three we are starting off our academic session on a very positive note level super foreign [Music] [Music] let's and derived quantities of units okay system of units thank so temperature is foreign so now that is because you are concerned about your weight so weight is also measurement correct measure funny terrible so that is all basically units left so foreign that will increase your temperature okay on the very example of uh measurement uh we need to measure something you have run uh in the 100 meters 200 meters 400 so we have the temperature right number we keep it at 22 23 24. so we measure temperature there speedometer you are measuring speed so these are all the most important areas where we use measurement so it is important in our day-to-day life measurements okay so so any quantity that can be measured is called as physical quantity for example on a very speed velocity displacement force they're called as physical quantities are you all happy with this so any quantity that can be measured is called as a physical quality okay any quality light or intensity yes that can also be measured very good the best it is given so that is the power of light coming out so it is also a physical quantity or physical quantity so apra now moving on physical quantity delay wishes thank you thank you thank you but yeah focus on the session sessions physical quality physical qualities why because they can be measured time can be measured height can be measured weight can be measured whatever can be measured is called as a physical quantity character super so matuna okay so the two types of physical quantities are first fundamental and secondary derived okay so the two types of physical quantities that we will be looking at either super so passing la fundamental quantity the physical quantities which are independent of other physical quantities are called as fundamental physical quantities allow it is basic fundamental physical quantity you cannot replace it with something else mass time electric current temperature amount of substance luminous intensity these seven quantities are your fundamental physical quantities in the element that you say the mark is important okay very good exactly pupita fundamental physical quantity is independent of any other physical quantity whereas derived physical quantity will be dependent on other physical quantities did you all like it so these are the seven fundamental physical quantities acceleration acceleration density volume force momentum a big round of applause vary level lower level great performance yes derived fundamental physical quantity okay so derived physical quantity is the right answer yeah yeah i've been getting it is nothing but force by mass so that is nothing but ah kg meter per second square by kg so it is meter per second square so meter per second square now length by time square so acceleration is a derived physical quantity which depends on length and time acceleration is a derived physical quantity which depends on length and time density that is nothing but kg per volume on the length cube so density depends on mass and length so density depends on mass and length acceleration depends on length and time volume depends on length force depends on what force depends on mass length and time force depends on mass length and time character and momentum depends on what momentum again depends on mass length and time okay again momentum depends on mass length and time pressure also depends on what pressure is nothing but force per unit area so f by a so that also depends on mass length and time did you all like it either formula ninth and tenth acceleration now it is forced by mass so force one day ah mass into velocity by time character divided by mass so acceleration is velocity by time density is mass by volume volume is just a length cube and the force is nothing but mass into acceleration momentum is nothing but mass into velocity pressure is nothing but force by area so in the formula it is a derived physical quantity momentum formula mass into velocity momentum is nothing but linear momentum linear momentum velocity formula pressure on the force by area they are dependent on other physical fundamental quantities so in the angiore physical quantity they are dependent is physical quantity what are the types of physical quantity measurements again foreign span you have to have something [Music] so under common system of measurements we have some units character very good very good very good so we need to standardize the measurement so what are the standards units of measurement length meter for length what are the most commonly used units meter centimeter foot massage kilogram kg ounce and then pound okay pound on the number famous for measuring mass okay so mass you measure with kg grams or pounds or ounces length on the meter centimeter and you also have foot these are all the standard units that we use in the standard user correct ah very good system okay we write it as lb that's how we write it lb is nothing but pound cherry hey elvis so these are all standard measurement units these are standard measurement units so upon the there are various units for every physical quantity in various regions of the world weightlifting india measurement of we wanted to even fine tune either either we wanted to make it more standard more universal unity to make it standard all over the world so that everybody follows si units so passing la ipo number either cooler we will look at this example number four so units okay acceleration there are three very important systems which are very important okay number mks system mks now meter kilogram second cgs now centimeter gram second fps units okay so each each country used to follow different units which was very bad so there was a need for an internationally accepted system of units it is a complete set of units called international system of units or si unit in si unit there are seven base and two supplementary units nasa pulsar supplementary units soldering here fundamental physical quantities can you all please put it up in the chat yeah happy birthday thank you so much thank you so much guys yes yes yes i received a lot of love from you all roman andre it makes me feel so grateful and thankful for each and every one of you okay so temperature amount of substance luminous intensity length number some basics of concepts of chemistry okay so the chemistry level uh kelvining already being a unit of uh temperature ampere on the current anomaly solution con quantities alone supplementary quantities in particular it is your plane angle and solid angle number angle measure panola theta 130 degree 45 degree 60 degree 90 degree so degree one day it is one unit of measurement so degrees on there it is called as plane angle so it can be measured with the help of radian units and our solid angle now it is a three dimensional angle solid angle now it is a three-dimensional angle so that is measured with the help of steradian okay that is measured with the help of steradian unit got it so radiant when the 2d stared in on the 3d raid in the 2d stared in on the 3d purim super super super how to measure radiance how to measure solid angle in stereo both i have given you number what uh charge by time is equal to current so is now fundamental quantity so charge on this it is i into t so charge is a derived quantity charge so units of derived quantities so derived quantities on the equation particular it is coming by multiplication or division of your fundamental quantities allow the random fundamental quantity multiplied elect divide panna then you will get something called as your derived quantity sorry so derived quantity examples in the velocity density acceleration forces pressure they are all derived quantities velocity on another distance by time so distance on the meter time on the yes foreign perfect perfect foreign okay not time answer c distance answer okay answer on the distance hello light year is the distance traveled by light in one year distance traveled by light in one year okay it is the distance traveled by light in one year so it is nothing but the velocity of light into one year which is 365 days into 24 hours into 3 600 seconds per hour correct 3 into 10 to the power 8 meter so meter per second character meter per second either on the second so second two seconds will cancel i don't so it is this many meters that is the distance traveled by light in one year so passing la hello is so so big so even after using such a big unit it's still massive okay so come on people try to be fast super super so don't worry meter per second square character second newton newton into second so that will be kg meter per second you know over a second or second cancel arrow so it is nothing but mass into velocity so mass into velocity now it is momentum so c is the right answer all those who said c were a level performance quiz second what is joules per second so what second is joules so first one on the it is joules only so that's correct newton meter newton meter on another it is forced into displacement force into displacement is nothing but work done work done is also joules [Applause] so b is wrong you know either one the mass into velocity so it is uh mass into velocity so that is momentum so b is momentum and not energy a is energy c is energy d is energy but b is momentum momentum and energy are different points is fundamental quantity fundamental quantity can never never ever be expressed in terms of other quantities so temperature is the fundamental quantity and the fundamental units so please that's correct jerish solomon thank you karthi very good very good a person what is the answer for this density of wood one there 0.5 gram per cc in the cgs system of units so mks value yellow five thousand ah okay where an answer sir five thousands are five thousand nasa pakka sir afrin thank you so much our friend shuttika thank you for all those who wish me on my birthday thank you so much guys it means a lot [Music] you have to convert grams into kg so 0.5 grams 10 power minus 3 kg divided by centimeter cube cubic cc cc cubic centimeter so obtain a centimeter cube centimeter cube now 10 power minus 2 meter whole cube so it will be 10 power minus 6 meter cube so it will become 0.5 into in the 10 power 6 minus 6 mala pochina 10 per 6 iron so 10 6 into 10 power minus 3 will become 10 part 3 so that will become kg per meter cube so 0.5 into 10 power 3 is 500 so 500 kg per meter cube answer you know mass should be in kg and quick quick quick quick [Music] represent the same physical quantity which of the which of the following patch represent the same physical quantity quicker quicker again is d is nothing but 10 to the power minus 7 joules so it is a unit of energy seconds on the time so same physical quantity radii and nuclear radii we can use fermi algebra which of the following is not a physical quantity great great great eunice vale level units so force is not a fundamental quantity either on the candela so either on the fundamental quantity corrected either ampere current fundamental quantity second time fundamental quantity so either a fundamental quantity it is not a fundamental quantity because it's newton newton is a unit of force force one or fundamental quantifiers it's a derived quantity over over over foreign [Music] on august 8th cheriah okay [Music] take care guys bye bye love you all see you