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

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

Optimist1998:
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

Optimist1998:

Density= mass/volume
From mathematics; volume=lxbxh
Area=lxb (or multiply any
two and you'll get area)

Density=mass/lxbxh
You can continue from there.

Donpre:
C

Donpre:
Masses m1 and m2 at the 20-cm and 65cm marks respectively of a uniform rule freely suspended at it centre of gravity. If the metre rule balances horizontally, determine the ratio m2:m1

a. 2:1 b. 3:3 c. 2:3 d. 1:2

Donpre:
A direct current of 5A flows through a 0.2H inductor. Calculate the energy stored in the inductor

a. 0.5j b. 1.0j c. 2.5j d. 5.0j

felix00:
. Should be C 2.5

Optimist1998:
Physics
Equations of motion and a little bit of projectile
+Two balls X and Y weighing 5 g and 50 kg respectively were throne up vertically at the same time with a velocity of 100 ms 1 .How will their positions be one second later?
A. X and Y will be 500 m from each other
B. Y will be 500 m ahead of X
C. X will be 500 m ahead of Y
D. X and Y both be 500 m from the point of throw

Simple Harmonic motion
+The motion of the tyres of a moving car.
II. The motion of a loaded test tube oscillated
vertically.
III. The beating of the heart.
IV. A stone tied to a string and whirled round.
V. The motion of the pistons in a gasoline engine.
Which of the motions above is simple harmonic?

A. III, IV and V only
B. II, III and V only
C. II, III and IV only
D. I,II and III only

Density
+A plastic sphere floats in water with 50% of its volume submerged. if it floats in glycerine with 40% of its volume submerged,the density of the glycerine is?

A. 1400 kgm-3
B. 1250 kgm-3
C. 500 kgm-3
D. 1000 kgm-3

+I. Density of the liquid.
II. Acceleration due to gravity.
III. Type of container of the liquid.
IV. The constituents of the liquid.
which of the above conditions will NOT affect the pressure of fluid?

A. I and III only
B. II and III only
C. III and IV only
D. I and II only

Progressive Wave
A progressive wave is represented by
y=10Sin(1000πt−πx/34)
Two layers of the wave separated by 153cm have a phase difference of

A. 270 degrees
B. 45 degrees
C. 90 degrees
D. 180 degrees
E. No Correct Option

Edit: Explain your answers if you don't mind

Optimist1998:


B-pisces

C- protein

Optimist1998:
Correct

Donpre:
Masses m1 and m2 at the 20-cm and 65cm marks respectively of a uniform rule freely suspended at it centre of gravity. If the metre rule balances horizontally, determine the ratio m2:m1

a. 2:1 b. 3:3 c. 2:3 d. 1:2

Nuel25846:
Tension A 1000kg elevator is descending vertically
with an acceleration of 1.0ms -2 , if the
acceleration due to gravity is 10ms -2 ,
the tension in the suspending cable is
A. 1.0N
B. 10.0N C. 9000.0N
D. 11 000N
1000kg*1.0ms+1000kg*10ms=11000N ans D

Optimist1998:
Which of the following is true of sounds?
A. sound travels faster in air at 20 o C than at 30 o C
B. the frequency of a given sound wave changes when it crosses the boundary seperating two media
C. the wavelength of a given sound wave in air decreases as the temperature increases
D. sound waves cannot be reflected

Please lets discuss this......
Why is C the answer, I don't agree with any of the options above. Maybe I'm missing something.

kristian98:

the answer is 9000
1000(10-1)

castrokiller:
The inner diameter of a test tube can be measured accurately using a

A. micrometer screw guage
B. pair of dividers
C. metre rule
D. pair of vernier calipers

IemFava:
since its descending,shouldn't it be addition

SirdimayG:

A(guessing)

IemFava:
D,I think

Donpre:
1192K

Optimist1998:

Density= mass/volume
From mathematics; volume=lxbxh
Area=lxb (or multiply any
two and you'll get area)

Density=mass/lxbxh
You can continue from there.

castrokiller:
EMPHATIC STRESS
All u need to know about emphatic stress is that it tries to test the communication linkage between the writer and the listener. Now note that wen u r given a question that has a noun to be its emphatic phrase,u simply change that noun to either another noun or to a pronoun word. If the emphatic phrase word is a verb,simply change it to another verb and so on.Examples-
(1) Aunty Olamide bought me a BICYCLE. The answer becomes; Did aunty Olamide buy a pen. In the above sentence u will notice that bicycle has been changed to pen.
(2) The president SPOKE to the press. The answer becomes; Did the president write to the press?
(3) My MOTHER served rice and fresh stew for the dinner. The answer becomes; Who served rice and stew for dinner? Now u will notice in the third example that the noun word 'MOTHER'has been changed to a pronoun word 'who'.

Now do these.
ASA is a lawyer. A. Is Asa a robber? B. Who is a lawyer? C. Is Asa the lawyer? D. Was Asa the lawyer?

Optimist1998:


[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

Eastatlantaniqqa:
Tayo's age is two-fourth twice dele's age. What is the diffrence between their ages ?

Pweedycutie:
A certain volume of gas at 298k is heated such that its volume and pressure are now four times their original value. whats the new temperature?