One thing is the propulsion of rocket is based on second law of motion where it states that if f is proportional to momentum then if u differentiate f wrt t then u get f = vdm/dt + mdv/dt mass of fuel is not constant in expulsion of rocket then f= vdm/dt and hence rocket propulsion is based on 2nd law of motion
newton's third law states that every action has an equal and an opposite reaction relative density is density of substance / density of water and we get to see that density of water is nothing but the formula of density is mass / volume so density of substance also = mass / volume we get to see that everything gets cancelled and thus it has no unit unlike the normal density which has unit as kgm^3 obviously we know 3 forms of matter exist which are solids liquids and gases and if there is something correct as the fourth state of matter it could only be plasma . buoyancy obviously cuz we know that force buoyant = density * volume * gravity which is 9.8 m/s or 10m/s . in pascal's law i think so it states that if a pressure s put on one part of the object it also is same in the other end obviously we know that sound cannot travel in vaccum pressure is increased with depth
yeah this is interesting fun fact : how to find whether a quantity is a scalar or a vector a vector * vector = a vector quantity a scalar * scalar = scalar quantitiy a vector* scalar = vector we can see that force formula is mass * acceleration so we can basically see that using basics we know that acceleration is a vector quantity so it is basically a vector quantity
2:33 Centrifugal force may stop applying, but the part of the force due to gravity doesn't change. My weight doesn't change when I am carried by an elevator, since my mass stays the same, acceleration caused by gravity doesn't change when other forces apply, only the net force does.
Your weight does change in an elevator, mass and weight aren't the same thing The apparent weight in a lift is vectorial sum of of ma and mg where a is acceleration due to lift and g is earth's gravitational field Also due to earth's rotation the centrifugal force in non inertial rotational frame causes our weight to decrease slightly this apparent change is due to change in value of g, where g(apparent)=g-Rw²cos(y) where g=9.8m/s², R=radius of earth, w= angular speed of earth and y=latitude since y at equator=0, cos(y)=1 and g(apparent)=g-Rw² when the earth stops rotating w becomes zero and g(apparent)=g which is greater than g-Rw², therefore the value of g increases and so does the weight, which can simply be defined as product of mass×g in accordance with newton's laws
If the spring is extended then released then kinetic energy will also be indulged hence this question needs more clarity either being a resting spring or extended spring
I have got 11 points, Thanks for your acknowledge
One thing is the propulsion of rocket is based on second law of motion where it states that if f is proportional to momentum then if u differentiate f wrt t then u get f = vdm/dt + mdv/dt mass of fuel is not constant in expulsion of rocket then f= vdm/dt and hence rocket propulsion is based on 2nd law of motion
newton's third law states that every action has an equal and an opposite reaction
relative density is density of substance / density of water and we get to see that density of water is nothing but the formula of density is mass / volume so density of substance also = mass / volume we get to see that everything gets cancelled and thus it has no unit unlike the normal density which has unit as kgm^3
obviously we know 3 forms of matter exist which are solids liquids and gases and if there is something correct as the fourth state of matter it could only be plasma .
buoyancy obviously cuz we know that force buoyant = density * volume * gravity which is 9.8 m/s or 10m/s .
in pascal's law i think so it states that if a pressure s put on one part of the object it also is same in the other end
obviously we know that sound cannot travel in vaccum
pressure is increased with depth
Okay
yeah this is interesting
fun fact : how to find whether a quantity is a scalar or a vector
a vector * vector = a vector quantity
a scalar * scalar = scalar quantitiy
a vector* scalar = vector
we can see that force formula is mass * acceleration so we can basically see that using basics we know that acceleration is a vector quantity so it is basically a vector quantity
Except Work it is a product of two vector quantities
@@bholanathsaha1161 cuz it's a scalar product
No dude there exist dot product as well vector*vector= scalar like in kinetic energy velocity squared is a dot product there
It was very useful in IGKO Exam, I am from Airson English School in Badlapur, INDIA 👍👍👍👍👍
But very important physic questions sir
Most welcome 😁
2:33
Centrifugal force may stop applying, but the part of the force due to gravity doesn't change.
My weight doesn't change when I am carried by an elevator, since my mass stays the same, acceleration caused by gravity doesn't change when other forces apply, only the net force does.
Your weight does change in an elevator, mass and weight aren't the same thing
The apparent weight in a lift is vectorial sum of of ma and mg where a is acceleration due to lift and g is earth's gravitational field
Also due to earth's rotation the centrifugal force in non inertial rotational frame causes our weight to decrease slightly
this apparent change is due to change in value of g, where
g(apparent)=g-Rw²cos(y)
where g=9.8m/s², R=radius of earth, w= angular speed of earth and y=latitude
since y at equator=0, cos(y)=1 and g(apparent)=g-Rw²
when the earth stops rotating w becomes zero and g(apparent)=g which is greater than g-Rw², therefore the value of g increases and so does the weight, which can simply be defined as product of mass×g in accordance with newton's laws
I surely recommend you to add like this vedios #really helpful 👍😊
So nice of you 😁😁
I got all 25🎉🎉
Question are easy for class X . Some body who got 22 from standard viii must be good at studies
Sonar
yah its amazing questions yar this youtube channel is very useful to us ra
25/25 bro very easy. Always thankful for this channel ❤
Chup Jhute,jhut bol raha hai sala
I got 22/25 Tq so much 👍👍
18
Thanks for giving us these knowledge❤
21 I got
Thanku sir awesome class😊
I had got 21/25 😊
suprlyy teached yarr u are the great person yarr
17/25 is correct
16 correct
"Bequeral" is the unit of radioactivity.
Curie is not the unit.
Both units are valid
There are si and cgs units
Curie is also a unit of radioactivity
Equinox
22 out of 25
Radar
I have got 20/25
Infinitty
Third
Radiation
Refraction
12
2: potential energy because stored energy in the spring
Thanks sir
Ths qstn was asked in recent nata phase 2 ppr
elastic potential energy
If the spring is extended then released then kinetic energy will also be indulged hence this question needs more clarity either being a resting spring or extended spring
I got all correct
Excellent 👏
@@LNT 😎
Tq sir
25/25
Excellent 👏👏👏
I've got 18 points. It's amazing
24/25 correct,😃
😮
yeah yarr nice yarr well done ra
I got all of it
Liar
Plasma
Good video
23
Tadioactivity
I got 22 correctly
Awesome 👏👏👏
@@LNT thanks 🇮🇳
3
Vaccum
First
Graphite
18/25 - I able to answer correctly!!!
Super 👏👏👏
25/25 marks lgot it l studiying 8std GHSS puzhathi
25/25 🎉🎉❤❤ 9th class
Vacuum is correct
MY ALL ANSWER ARE CORRECT
Convection
I got 22 out of 25
Solar
Thanks to you sir 👍❤❤❤
Rectifier
I also got 17/25.
I got 17 I am in 6th standard
Iam studying in 8 th standard I got 21/25
Who gives u a phone😀😃😃
Good u got 21 /25
I am also 8 th but i got 24/25 🎉🎉
It is bcuz I am topper
@@bharathgaming592 go and say to ur mom and take a 🍫🍫🍫
So what
9.8km/s
Please play in live also
21/25
Very good 👏👏👏
Decreased
Water
Newton law
I got 22 correct.😊
60uz
Radio
I came first in my school in birds with 99%
My score 19/25🙂
2-d
1:20
2:35
Force
B
Very nice Sir......
Thank you 😁😁
25 correct
I study this questions in 5th class
Couloumb
24/25. I didn't know that acc'n due to gravity would change if the Earth stopped rotating.
Nice
20/25 7th grade
Please dont read the answer a, b, c, d it feel bore,just read the right answer.
Decibel
Total internal refraction
Kg m2
Radioactivity
Increase
Infinity
11.2 mm.s
I can’t believe I’m watching this for entertainment
A force
Potential energy
Buoyancy
Sir please share classes in Bipc Eamcet
Sure 😊
No unit
D
Mass