If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be
restored by
A. decrease the length of the wire
B. increasing the length of the wire
C. increasing the mass per unit length of the wire
D. changing the temperature of the wire

[img]http://latex.codecogs.com/gif.latex?F%3D%5Cfrac1%7B2l%7D%5Csqrt%7B%5Cfrac%7BT%7D%7Bm%7D%7D[/img]
Break down the formula

*F is inversely proportional to the square root of mass
*F is also inversely proportional to length.

If we deep the load(mass) in a bucket of water the weight will reduce due to upthrust

You can either substitute figures to solve or better yet
Simple logic
If we decrease the length of the wire the frequency will increase.
How can we get our normal frequency back?
Increase the length of the wire so that the frequency will reduce to what it was before

pabostt:


Temperature difference =( linear expansivity * length)/increase in length

For metal P,

Qp = ( linear expansivity * length)p/increase in lengthp

For metal Q,

Qq = ( linear expansivity * lengthq)/increase in lengthq

( linear expansivity * length)p/increase in lengthp = ( linear expansivity * lengthq)/increase in lengthq

increase in length of p:increase lengthq = ( linear expansivity * length)p / ( linear expansivity * lengthq)

increase in length of p:increase lengthq = 2/3 *3 /4 = 6 / 12 = 1:2

A is the correct option
you can visit http://servantboy.com/2017/03/27/questions-and-answers-on-linear-expansivity-for-utme/

This blog is super cool

And I guessed that answer o. B

Comman see Moment questions

---

A man holds a 100 N load stationary in his hand. The combined weight of the forearm and hand is
20 N. The forearm is held horizontal, as shown


What is the vertical force F needed in the biceps?{cambridge may/june 2014 p11 ques 12}
A 750 N
B 800 N
C 850 N
D 900 N



A uniform plank AB of length 5.0 m and weight 200 N is placed across a stream, as shown below


A man of weight 880 N stands a distance x from end A. The ground exerts a vertical force FA on the plank at end A and a vertical force FB on the plank at end B.
As the man moves along the plank, the plank is always in equilibrium.The man stands a distance x = 0.50 m from end A. Use the principle of moments to
calculate the magnitude of FB.
{cambridge may/jun 2014 p21 q3}


Source: servantboy.com

Donpre:

Nobody got this question right... B is definitely wrong!

I had to settle for pisces
The other options were looking absurd na

Force on a current carrying conductor
Two long parallel wires X and Y carry currents 3A and 5A respectively. If the force experienced per unit length by X is 5 x 10-5N, the force per unit length experienced by wire Y
A. 3 x 10-5N
B. 3 x 10-6N
C. 5 x 10-4N
D. 5 x 10-5N

castrokiller:
And I guessed that answer o. B

Hehe sleek guess

I don write Jamb and I dey 200L but dis questions strange oo... But no worry I pass am wella

Optimist1998:
Force on a current carrying conductor
Two long parallel wires X and Y carry currents 3A and 5A respectively. If the force experienced per unit length by X is 5 x 10-5N, the force per unit length experienced by wire Y
A. 3 x 10-5N
B. 3 x 10-6N
C. 5 x 10-4N
D. 5 x 10-5N

D is the answer
Newton's third law. But I Use the formula for the magnetic force between two current carrying conductors and the left hand rule for the direction of the force

[quote author=Donpre post=54966177]this is good!

good

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Hello guys. Have been using my new school physics. I feel like reading another physics textbook to advance my knowledge of different definition and formulas. If you are to recommend,[b][/b] which textbook will you implote me to buy-well explained textbook tho.

Buy ADVANCED PHYSICS(NELKON AND PARKER) @sirdimayG

Nice thread

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SirdimayG:
Hello guys. Have been using my new school physics. I feel like reading another physics textbook to advance my knowledge of different definition and formulas. If you are to recommend,[b][/b] which textbook will you implote me to buy-well explained textbook tho.

FOR your O'Level, you should try and get 'Comprehensive Certificate Physics' by Olumuyiwa Awe and O. O. Okunola.

By far, one of the best Physics textbook in terms of their clear, understandable and numerous calculations and of course, explanations and theories I've come across.

Please, I would like us to also shed light on chemistry, not only physics. And try explaining very well on topics like Light, Sound, Electricity, ..., I'm still in SS2 and I haven't covered all physics topics. Thanks.

castrokiller:

D is the answer
Newton's third law. But I Use the formula for the magnetic force between two current carrying conductors and the left hand rule for the direction of the force

What's the formula and can you show ur working pls

[quote author=mozihla post=54992174][/quote]
Definately C,because dat is a Ca(HCO3)2 was sublime to heat to liberate salt and water and CO2 as bye product

The period (T) of a simple pendulum depends only on
a) the mass of the Bob b) length of the pendulum c) acceleration due to gravity d) the force causing the acceleration

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Godhead4:



FOR your O'Level, you should try and get 'Comprehensive Certificate Physics' by Olumuyiwa Awe and O. O. Okunola.

By far, one of the best Physics textbook in terms of their clear, understandable and numerous calculations and of course, explanations and theories I've come across.

Thanks. Hope all these are there?

Godhead4:
The period (T) of a simple pendulum depends only on

a) the mass of the Bob
b) length of the pendulum
c) acceleration due to gravity
d) the force causing the acceleration

A(guessing)

Godhead4:
The period (T) of a simple pendulum depends only on

a) the mass of the Bob
b) length of the pendulum
c) acceleration due to gravity
d) the force causing the acceleration

DAT should be C

SirdimayG:
Hello guys. Have been using my new school physics. I feel like reading another physics textbook to advance my knowledge of different definition and formulas. If you are to recommend,[b][/b] which textbook will you implote me to buy-well explained textbook tho.

.

You can make use of the science physics by afolabi or lamlard physic.