Eben331:
Thanks bro, I knw there must be a formula for tension. Elucidate on angular frequency. What is the symbol of surface tension?

samuelizz:


The unit of surface tension is Nm-¹

where N is newton , and m is metre

Newton is the unit of a force, F, and F = m × a

where a is the acceleration and m is the mass

F = kg × ms-² = kgms-²

That is, newton equals kgms-²

Nm-¹ = kgms-² × m-¹

= kgs-²

which in dimension gives, MT-².

The unit of tension is the same as the unit of force which Newton = kgms-²

in dimension, that is , MLT-²

Damayogenius18:
...in circular motion angular velocity w = teta/t.. Teta is angule turn by the body in circular motion...angular velocity is the angle turn through per second...unit is radian per second...rads^-1...but for one complete oscillation,the body turn one revolution...teta is then = 2π and t is now the period "T".. So w= 2π/T...1/T =f..w=2πf..shm,we talk of
"w" as angular frequency..is revs^-1( rev per second)..we don't talk abt it has angle turn..we talk abt is has frequency of body oscillating...there is no really any diffence BTW angular velocity and angular freqhency just a change of name..the unit is also rads^-1

Damayogenius18:
...symbol of surface tension is Sigma..I cant get the symbol on my fone..as I don't have teta symbol also...also let's appreciate doc Samuel for also helpinh us..he does not av to but he came back to help we aspirant..

Eben331:
yeah bro. I really appreciate his efforts. I thought he is an engineer to be.

Damayogenius18:
...Oh,I saw something related to medicine in is post.......PS: I use many bio textbook..modern,essential,comprehensive,explicit,exam focus...wanna try idodo umeh soon...

Eben331:
chai!! about 6 textbooks on biology alone. How is Explicit Biology?

coolxpaul:
What are my chances of getting MBBS at ui. Utme 334 and am 4rm Delta state. Is there going to be issues since am not 4rm Southwest?
What are deir catchment areas?

Damayogenius18:
...its gud BT ppl hype it a lot....it expose you to a lot of question BT does not give u the fundamental knowkedge u need...exam Focus is the opposite.. It cram a lot of information into small page BT gives few questions...u will be OK,if u can use both...

Eben331:
chai!! about 6 textbooks on biology alone. How is Explicit Biology?

Eben331:
I will like to buy both bt because of finance, i will go for explicit. i already have modern bio. College Bio is gud, u can go for it.

Damayogenius18:
...some medical aspirant are using more than six self...if you are going for med...they are choosing at most 120 from up to 800 extremely brilliant student... You av to go extra mile...

Damayogenius18:
...I av college bio(idodo umeh)already..av read it once BT didn't really exploit it...dat's wat I wanna do now....

Damayogenius18:
The UI practise ques looks very simple bt technical esp phy ..Guy' s let's start solving it..u can post it if u don't understand the answer choosen( some of them are wrong)...

Eben331:
Boss ke. I am your boy o. From V2=V1(1+gamma*change in tita) V2/V1=1+gamma*change in tita---eqn (i) Know dat volume is inversely proportional to density, we can say dat d=M/V where M is mass which is a constant. M=dV d1V1=d2V2 V2/V1=d1/d2 Substitute for eqn(i): 1+gamma*change in tita=d1/d2 d1=d2(1+gamma*change in tita) You can use d1 to rep density of mercury at 0degree celsius and d2 to rep density of mercury at 100 degrees celsius and at 22 degrees celsius. SOLUTION: By making d2 the subject of formula: d2=d1/1+gamma+change in tita d2 at 100^oC=1.36*10^2/1+180*10^-6*100=136/1.018=1.33*10^2kg/m3 d2 at 22^oC=1.36*10^2/1+180*10^-6*22=136/1.00396=1.35*10^2kg/m3.

Eben331:
can we say the formula for surface tension=F/2l? i dnt undastand the '2' there.

Damayogenius18:
Guys..one of the practise question which I think the option chosen its wrong...no 4...A force of 20N is applied parallel to the horizontal table is just sufficient to make block 4kg set in motion..find the acceleration when the force is doubled..A.2..B..4..C..5..D..10..

Damayogenius18:
...I remember av seen this formula b4 somewhere in maybe essential physics or new science...The formula for surface tension is force per unit effective length. F/ d..BT if the liquid has two film side base on the shape of the container...d= 2l....so surface tension will then equal F/2l..lemme use water as an example..a needle drop in a water experience total surface tension of F/d..but the water is exerting tension on two edge of the needle..the surface tension exerted at each edge is F/ 2l BT the total surface tension is F/2l + F/2l = F/ l...the formula u used is based on the length given to you..

Gracy3535:
The answer is D.10

Damayogenius18:
..thanks grace...they choose C..5

Damayogenius18:

11. A stone which is dropped into a dry well hits the bottom in 2.2 s. How deep is the well? (Take
g=10m/s) (A) 40.4 m (B) 2.4 m (C) 48.4 m (D) 24.2 m

Damayogenius18:

7. A physics student standing on the edge of a cliff throws a stone vertically downward with an
initial speed of 10.0 m/s. The instant before the stone hits the ground below, it is traveling at
a speed of 30.0 m/s. If the physics student were to throw the rock horizontally outward from
the cliff instead, with the same initial speed of 10.0 m/s, what is the magnitude of the velocity
of the stone just before it hits the ground...A..10..B..20..C..30..D..40

Damayogenius18:
...doc,there is formula for surface tension....is force per unit length acting on the surface of the liquid....F/l...MLT^-2/L...MT^-2.... Force can be generally group into pull or push...tension, thrust...e.t.c are forces..Tension has many formula depending on the question but let's use this...T= mv^2/ r + mg..T=ma + mg...MLT^-2 + MLT^-2...T =MLT^-2....

Gracy3535:
For this i got D.24.2m

Eben331:
how can tension be derived in mechanics? Which physics textbook do u use? I am sorry for asking too much questions. Thanks.

Damayogenius18:
..give solution

samuelizz:



Did you read what you quoted?