The tendency of a body to remain at rest when a force is supplied to it is called
Aimpulse
Bmomentum
Cinertia
Dfriction
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Question 562
waec2003
A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water
A4N
B5N
C48N
D60N
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Question 563
waec2003
A tuber of cassava can be processed into powder. This explains the face that
Amatter can change sponteneously from one state to another
Bmatter cannot be destroyed
Cforce is required to change natter from one state to another
Dmatter is made up of tiny particle
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Question 564
waec2002
A nuclide X is produced by bombarding a nitrogen(N) nucleus with an alpha(\alpha\) particle with the release of heavy hydrogen(D) nucleus as shown by the following nuclear equation, \(\alpha + ^{14}_{7}N \to ^p_qX + ^2_1D\). Determine the values of p and q in the equation
A12 and 6
B14 and 7
C16 and 8
D19 and 8
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Question 565
waec2002
Which of the following materials is used to control the rate of neutron production in a nuclear reactor?
Aboron rods
Bconcrete shield
Cgraphite rods
Duranium rods
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Question 566
waec2002
Which of the following is usually used to cause fission in an atomic reactor?
AAlpha particles
Bbeta particles
Celectrons
DNeutrons
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Question 567
waec2002
If a radioactive atom emits a beta particle, Its mass number
Aincreases by one
Bremains the same
Cdecreases by one
Dincreases by two
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Question 568
waec2002
In a model of the hydrogen atom, the energy levels Wn are given by the formula Wn = -\(\frac{R}{n^2}\), where n is an integer and R is a constant. Determine the energy released in the transition from n = 3 to n = 2.
A\(\frac{R}{5}\)
B-\(\frac{R}{4}\)
C\(\frac{5R}{36}\)
D\(\frac{-5R}{36}\)
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Question 569
waec2002
Calculate the inductance L, of the coil in the circuit diagram shown above
A3.8H
B0.6H
C0.4H
D0.2H
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Question 570
waec2002
A freely-suspended magnet swinging in a horizontal plane comes to rest with its axis pointing approximately
Anorth-south
Bsouth-west
Cnorth-east
Dsouth-east
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Question 571
waec2002
A transformer has 400 turns and 200 turns in the primary and secondary windings respectively. If the current in the primary and secondary windings are 3A and 5A respectively. calculate the efficiency of the transformer?
A85.0%
B83.3%
C37.5%
D30.0%
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Question 572
waec2002
Which of the following actions will not lead to an increase in the induced e.m.f. in a coil of wire rotating between the poles of a magnet? Increasing the
Astrength of the magnet
Bnumber of turns in the coil
Cspeed of location in the coil
Dgap between the poles of the magnet
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Question 573
waec2002
The lead-acid accumulator consists of a
Alead as the positive electrode
Blead ocide as the negative electrode
Chydrochloric acid as the electrolyte
Dtetraoxosulphate(VI) acid as the electrolyte
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Question 574
waec2002
Local actions is normally prevented in a simple electric cell by
Aintroducing an oxidizing agent in the acid
Bnot drawing current continously for long period
Camalgamating the surface of the zinc plate
Dusing a porous pot to isolate the zinc plate from the acid
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Question 575
waec2002
The magnitude of the gravitational attraction between the earth and a particle is 40N. If the mass of the particle is 4kg. Calculate the magnitude of the gravitational field intensity of the earth on the particle
A10.0N kg-1
B12.6N kg-1
C25.0N kg-1
D160.0N kg-1
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Question 576
waec2002
Two spheres of masses 100kg and 90kg respectively have their centres separated by a distance of 1.0m. Calculate the magnitude of the force of attraction between them. [G = 6.70 x 10-11Nm-2kg-2]
A6.70 x 10-11N
B6.70 x 10-10N
C6.03 x 10-11N
D6.03 x 10-7N
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Question 577
waec2002
Three capacitors each of capacitance 18\(\mu F\) are connected in series. Calculate the effective capacitance of the capacitors
A54.00\(\mu F\)
B18.00\(\mu F\)
C6.00\(\mu F\)
D0.17\(\mu F\)
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Question 578
waec2002
Which of the following items can be used to compare the relative magnitudes of electric charges on two bodies?
Aebonite rod
Bgold leaf electroscope
Cproof plane
Dthe electrophorus
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Question 579
waec2002
Which of the following actions will not cause an increase in the frequency of a vibrating string?
Aincreasing the tension of the string
Bdecrease the mass per unit lengthof the string
Cdecrease the length of the string
Dincreasing the cross sectional area of the string
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Question 580
waec2002
Which of the following instruments is not a wind instrument?
