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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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2,483 questions

Question 1 of 20 2,483 total questions

Question 861

jamb 1994

When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at 50°C, the final temperature was 66°C. Given that the specific heat capacity of L2is half that of L1, find x

A50g

B100g

C150g

D200g

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Question 862

jamb 1994

A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change?

A2.6 x 10⁵Nm^-2

B2.4 x 10⁵Nm^-2

C2.2 x 10⁵Nm^-2

D1.3 x 10⁵Nm^-2

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Question 863

jamb 1994

The melting point of naphthalene is 78^oC. What is this temperature in kelvin

A100k

B351k

C378k

D444k

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Question 864

jamb 1994

If a solid X floats in liquids P of relative density 2.0 and in liquid Q of relative density 1.5, it can be inferred that the

Aweight of P displaced is greater than that of Q

Bweight of P displaced is less than that of Q

Cvolume of P displaced is greater than that of Q

Dvolume of P displaced is less than that of Q

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Question 865

jamb 1994

The mass of a specific gravity bottle is 15.2g when it is empty. it is 24.8g when filled with kerosene and 27.2g when filled with distilled water. Calculate the relative density of kerosene

A1.25

B1.10

C0.90

D0.80

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Question 866

jamb 1994

Which of these statements are TRUE of pressure in liquids? i. pressure acts equally in all direction. ii. pressure decreases with depth. iii. pressure at the same level of a liquid is the same. iv pressure is dependent on the cross-sectional area of the barometer tube

Ai, iii only

Bi, ii, iii only

Ci, iii, and iv only

Di, ii, iii and iv

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Question 867

jamb 1994

A force of 15N stretches a spring to a total length of 30cm. An additional force of 10N stretches the spring 5cm further. Find the natural length of the spring

A25.0cm

B22.5cm

C20.0cm

D15.0cm

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Question 868

jamb 1994

Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm

A\(\frac{1}{140}\)\(\pi\)

B14\(\pi\)

C70\(\pi\)

D140\(\pi\)

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Question 869

jamb 1994

Calculate the magnitude of the force required to just move a 20kg object along a horizontal surface if the coefficient of friction is 0.2. [g = 10ms^-2]

A400.0N

B40.0N

C4.0N

D0.4N

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Question 870

jamb 1994

A cone in an unstable equilibrium has its potential energy

Adecreased

Bincreased

Cunchanged

Doscillating

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Question 871

jamb 1994

An object of mass 50kg is released from a height of 2m.Find the kinetic energy just before it strikes the ground

A250J

B1000J

C10 000J

D100 000J

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Question 872

jamb 1994

Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity?

AThe energy is costant but the linear momentum varies

BThe linear momentum is conatant but the energy varies

Cboth energy and linear momentum are constant

DThe speed and the linear velocity are both constant

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Question 873

jamb 1994

A motor vehicle is brought to rest from a speed of 15ms^-1 in 20 seconds. Calculate the retardation.

A0.75ms^-1

B1.33ms^-2

C5.00ms^-2

D7.50ms^-2

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Question 874

jamb 1994

An object is projected with a velocity of 80ms^-1 at an angle of 30^o to the horizontal.The maximum height reached is

A20m

B80m

C160m

D320m

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Question 875

jamb 1994

A boat travels due east at a speed 40ms\(^{-1}\)s across a river flow due south at 30ms\(^{-1}\)s. What is the resultant speed of the boat?

A1.3ms^-1

B10.0ms^-1

C50.0ms^-1

D70.0ms^-1

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Question 876

jamb 1994

If it takes 5.0 hrs to drain a container of 540.0m\(^3\) of water, what is the flow rate of water from the container in kgs\(^{-1}\)? [Density of water = 1000kgm\(^{-3}\)]

A32.5kg^-1 s

B31.5kg^-1

C30.8kg^-1 s

D30.0kg^-1 s

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Question 877

jamb 1993

In the network shown above, determine the potential difference across the 5µF capacitor

A3V

B6V

C12V

D18V

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Question 878

jamb 1993

The current I in the fig above is

A4.00A

B1.30A

C0.80A

D0.75A

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Question 879

jamb 1993

Two mirrors M1 and M2 are inclined at right angles as shown above calculate the angle of reflection of the ray of light at M2

A\( 30^{\circ} \)

B\( 45^{\circ} \)

C\( 60^{\circ} \)

D\( 90^{\circ} \)

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Question 880

jamb 1993

In the fig above,A lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms-2]

A9N

B18N

C20N

D200N

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