emmyeuler1: THE ANS IS (C).....600000+[25/100(600000)]=7.5X10^5

buzyguy: 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

joseboy199:
ans z A

joseboy199:
B,

buzyguy: 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 mathematical signz

buzyguy: U tried,25% meanz workdone against frictn then the efficiency wld be 100%-25%=75%,frm dat nw we cn workout da work done by the effort to giv awa desired ansa.

buzyguy: U tried,25% meanz workdone against frictn then the efficiency wld be 100%-25%=75%,frm dat nw we cn workout da work done by the effort to giv awa desired ansa.

emmyeuler1: THEN TELL ME THE CORRECT ANSWER SINCE I AM WRONG...!

emmyeuler1: F=1/2L(ROOT(T/M))....F=K/L...250=k/50....k=12500....to produce an octave frequency....500=12500/L...L=12500/500...L=25CM....ANS(A)

buzyguy: Anoda1:an object slidez down an inclined plane from an initial height of 30m.itz velocity at the foot of the plane z 20m/s.the percentage of itz initial potential energy wich z dissipated as heat z,a.33.3% b.50% c.60% d.none

joseboy199: a hunter 412.5m away from a clif,moves a distance x 2wrds d clif n fires a gun.he hears d echo 4rm d clif afta 2secs.calc d value of x(speed of sound in air=330m/s)

buzyguy: Nt b

joseboy199: a man stands one-third of d way btw two walls and clap his hands.he hears two distinct echoes 1s apart.if d speed of sound is 330m/s,d distance btw d walls is...JAMB 1980 QUE 45

buzyguy: Anoda1:an object slidez down an inclined plane from an initial height of 30m.itz velocity at the foot of the plane z 20m/s.the percentage of itz initial potential energy wich z dissipated as heat z,a.33.3% b.50% c.60% d.none

joseboy199:
Ans z c

emmyeuler1: % OF original potential energy lost as heat=(100m/300m)*100=33.3%....ans(A)

buzyguy: Distnce frm da hunter to wall wen he firez z 330m,d=vt,330 * 1.den x=412.5-330 wich z 82.5m

joseboy199:
Initial dist 4rm clif x1=412.5,final dist=x2,echo time t=2.2s.sound speed v=330m/s
x2=vt/c,330*2.2/2=363
dist moved toward cliff,x=x1-x2=412.5-363=49.5m

buzyguy: Anoda:as the tension in an elastic string is increased frm 100N to 180N,the string extends by 10cm.the workdone in the string z,a.8j b.10j c.14j d.18j

joseboy199:
Workdone in a string=average force*extension
therefore,average force=180+100/2=280/2=140N,extension=10cm=0.1m
workdone=140*0.1=14j

joseboy199: The wavelength of a stationary wave z 36.0cm.what z d distance btw a node n d nxt anti-node
2)A wave of frequency 10HZ forms a stationary wave pattern in a medium whr d velocity is 20cm/s.d distance btw d adjacent node z
3)radio waves emitted 4rm an antenna are pickd up by a radar afta reflection 4rm an aircraft in 4*10^-3s.how far is d aircraft 4rm d antenna(v=3*10^3m/s)

buzyguy: Bt u typd 2secs instead ov 2.2secs

joseboy199: The wavelength of a stationary wave z 36.0cm.what z d distance btw a node n d nxt anti-node
2)A wave of frequency 10HZ forms a stationary wave pattern in a medium whr d velocity is 20cm/s.d distance btw d adjacent node z
3)radio waves emitted 4rm an antenna are pickd up by a radar afta reflection 4rm an aircraft in 4*10^-3s.how far is d aircraft 4rm d antenna(v=3*10^3m/s)

joseboy199: The wavelength of a stationary wave z 36.0cm.what z d distance btw a node n d nxt anti-node
2)A wave of frequency 10HZ forms a stationary wave pattern in a medium whr d velocity is 20cm/s.d distance btw d adjacent node z
3)radio waves emitted 4rm an antenna are pickd up by a radar afta reflection 4rm an aircraft in 4*10^-3s.how far is d aircraft 4rm d antenna(v=3*10^3m/s)

joseboy199: The wavelength of a stationary wave z 36.0cm.what z d distance btw a node n d nxt anti-node
2)A wave of frequency 10HZ forms a stationary wave pattern in a medium whr d velocity is 20cm/s.d distance btw d adjacent node z
3)radio waves emitted 4rm an antenna are pickd up by a radar afta reflection 4rm an aircraft in 4*10^-3s.how far is d aircraft 4rm d antenna(v=3*10^3m/s)

joseboy199: The wavelength of a stationary wave z 36.0cm.what z d distance btw a node n d nxt anti-node
2)A wave of frequency 10HZ forms a stationary wave pattern in a medium whr d velocity is 20cm/s.d distance btw d adjacent node z
3)radio waves emitted 4rm an antenna are pickd up by a radar afta reflection 4rm an aircraft in 4*10^-3s.how far is d aircraft 4rm d antenna(v=3*10^3m/s)