Simplefemo:
R= V-IRg/I
R=10-0.005*50 / 0.005
=10-0.25 / 0.005
=9.75 / 0.005
R= 1950 ohms

Correct

Why does a drop of petrol make a finger colder than a drop of water?

Oyinprince: Why does a drop of petrol make a finger colder than a drop of water?

because it draws its heat of vaporisation from the body (finger).

Simplefemo:
because it draws its heat of vaporisation from the body (finger).

correct! Where are the others on this thread?

EXPLAIN WHY THE BOND ANGLE OF AN AMMONIA MOLECULE IS LESS THAN THAT OF A WATER MOLECULE BY 2DEGREEZ?

Ogbona feli feli
Dnt be told.... Take part init.... Coz it mite be helpful
Dnt miss d questns on THEPOTTERS WHEELS... Check English thread 4 it
success is d surest

Utme/post-utme tutorial for mathematics
https://www.nairaland.com/1255112/mathematics-tutorial-utme-post-utme-other#15204057

HOW MANY STEREO-ISOMERS HAS A GLUCOSE MOLECULE?

HALIDES OF ALUMINIUM SUCH AS AlCl3 ARE CLASSIFIED AS LEWIS ACIDS....HOW THEN DOES THIS COMPOUND ATTAIN STABILITY i.e OVERCOME LEWIS ACIDITY?

a progressive wave has a wavelength of 50cm.calculate d phase difference btw two points at a distance of 20cm apart..

20/50=2/5landa

joseboy199: a progressive wave has a wavelength of 50cm.calculate d phase difference btw two points at a distance of 20cm apart..

buzyguy: 20/50=2/5landa

wrong,,,Try again

Ah,notn again oo

joseboy199:
wrong,,,Try again

I only rushd in nd out da other tym,i grt evrybdy here brngn ds thread alive...una all weldne oo.success z ourz ijn

joseboy199:
wrong,,,Try again

...Broda pls help me out because i am not good in physics....phase difference =[2(pie)(x)/lamda] =(2XpieX20)/50=4/5PIE

Sum1 try ds:a crate which z pulld up a smooth inclined plane with a force F moves up the plane with an acceleratn of a.if F z doubld,the acceleratn,a.is quadrupld b.more than doubld c.doubld d.lez dan doubld

THIS YEAR UTME

joseboy199:
wrong,,,Try again

....PLEASE HELP ME BECAUSE I'M NOT GOOD IN PHYSICS....Phase difference=[(2)(pie)(x)/lamda]=2(pie)(20)/50=4/5 pie....but pie=180....therefore,((4/5)X180)=144 DEG

Yeah,u r vry rite.i tot da 50cm z equivalnt distance for landa.jst realiz itz landa gangan,gud lov dat.

emmyeuler1: ...Broda pls help me out because i am not good in physics....phase difference =[2(pie)(x)/lamda] =(2XpieX20)/50=4/5PIE

Anoda attempt:a studnt attemptz to estimat the speed of sound in air by dropping a stone into an 80m deep well.he heard the sound of the stone'z splast in water 4.25s after its release.if g=10ms^-2,the estimatd speed of sound in air in ms^-1 is,a.320 b.330 c.335 d.340

Wich of da follwn z employd in making match head?a.Pb02 b.kclo3 c.kno3 d.silicone

buzyguy: Anoda attempt:a studnt attemptz to estimat the speed of sound in air by dropping a stone into an 80m deep well.he heard the sound of the stone'z splast in water 4.25s after its release.if g=10ms^-2,the estimatd speed of sound in air in ms^-1 is,a.320 b.330 c.335 d.340

The Answer is A.320
calc d time 4 d stone 2 splash into d well
v2-u2=2as
a=10, s=80
v2=u2 + 2as
v2=0 + 2*10*80
v2=1600
v=40
v=u +at
40=0 + 10t
40=10t
t=4sec
it takes 4 seconds 4 d stone 2 splash into d well, therefore, it takes 0.25 sec for d sound 2 travel back through d 80m distance
v=s/t
v=80/0.25
v=320m/s.

buzyguy: Sum1 try ds:a crate which z pulld up a smooth inclined plane with a force F moves up the plane with an acceleratn of a.if F z doubld,the acceleratn,a.is quadrupld b.more than doubld c.doubld d.lez dan doubld

F=ma so option C

Hmm,absolutely correct!lng tym,apy to see u back

larri: The Answer is A.320
calc d time 4 d stone 2 splash into d well
v2-u2=2as
a=10, s=80
v2=u2 + 2as
v2=0 + 2*10*80
v2=1600
v=40
v=u +at
40=0 + 10t
40=10t
t=4sec
it takes 4 seconds 4 d stone 2 splash into d well, therefore, it takes 0.25 sec for d sound 2 travel back through d 80m distance
v=s/t
v=80/0.25
v=320m/s.

U r rite,bt 4gottn dat it encounterz frictnal force.ansa z nt c

snave007: F=ma so option C

Anoda attempt:a lift of weight 30kN movez upwardz through height of 20m.if 25% of the workdone on the lift z used in overcoming friction,the work done is a.4.5 *10^5j b.6.0 *10^5j c.7.5 *10^5j d.8.0 *10^5j

Anoda:a boy standn between two cliffs which are 850m apart clapz his hands and receivez the echo from the nearer cliff after 2s.if the speed of sound in air z 348ms^-1,he will receive the echo from the second cliff after,a.1.5s b.2.5s c.2.8s d.3.0s

emmyeuler1: ...Broda pls help me out because i am not good in physics....phase difference =[2(pie)(x)/lamda] =(2XpieX20)/50=4/5PIE

Correct

Anoda:a pipe organ X produces a note whose pitch z twice that of the note produced by a secnd pipe organ Y.if the speed of the wave in X z v,then the speed of the wave in Y z,a.v b.2v c.v/2 d.4v

buzyguy: Anoda attempt:a lift of weight 30kN movez upwardz through height of 20m.if 25% of the workdone on the lift z used in overcoming friction,the work done is a.4.5 *10^5j b.6.0 *10^5j c.7.5 *10^5j d.8.0 *10^5j

THE ANS IS (C).....600000+[25/100(600000)]=7.5X10^5

buzyguy: Anoda attempt:a lift of weight 30kN movez upwardz through height of 20m.if 25% of the workdone on the lift z used in overcoming friction,the work done is a.4.5 *10^5j b.6.0 *10^5j c.7.5 *10^5j d.8.0 *10^5j

ans z A

anoda:a vibrating string of length 5ocm producez a note of frequency 250Hz.in order to produce a note wich z an octave higher,the length of the string required z,a.25cm b.25[squar.root 2]cm c.50[squar.root 2]cm d.100cm am sori 4da inaccuracy of mathematicl signz