WAEC SSCE - Physics - 2004 (Objective)
Frage 1 Bericht
Antwortdetails
Frage 2 Bericht
Antwortdetails
Frage 3 Bericht
Antwortdetails
Frage 4 Bericht
Antwortdetails
Frage 5 Bericht
Antwortdetails
Frage 6 Bericht
Antwortdetails
Frage 7 Bericht
Antwortdetails
Frage 8 Bericht
Antwortdetails
Frage 9 Bericht
Antwortdetails
Frage 10 Bericht
Antwortdetails
Frage 11 Bericht
Antwortdetails
Frage 12 Bericht
A body is dropped from a certain height above the ground level, falls with uniform
Antwortdetails
Frage 13 Bericht
Antwortdetails
Frage 14 Bericht
Antwortdetails
Frage 15 Bericht
Antwortdetails
Frage 17 Bericht
Antwortdetails
Frage 18 Bericht
Antwortdetails
Frage 19 Bericht
Antwortdetails
Frage 20 Bericht
Antwortdetails
Frage 21 Bericht
Antwortdetails
Frage 22 Bericht
Antwortdetails
Frage 23 Bericht
Antwortdetails
Frage 24 Bericht
The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave
Antwortdetails
Frage 25 Bericht
Frage 26 Bericht
Antwortdetails
Frage 27 Bericht
Antwortdetails
Frage 28 Bericht
Antwortdetails
Frage 29 Bericht
Antwortdetails
Frage 30 Bericht
In an experiment using a converging lens to produce real images on a screen, the linear magnification m, is plotted against the image distance v, as illustrated in the diagram below. The distance OP represents the
Frage 31 Bericht
Antwortdetails
Frage 32 Bericht
Antwortdetails
Frage 33 Bericht
Antwortdetails
Frage 34 Bericht
Antwortdetails
Frage 35 Bericht
When compared with water, mercury is preferred as a thermometric liquid because
Antwortdetails
Frage 36 Bericht
Antwortdetails
Frage 37 Bericht
Antwortdetails
Frage 38 Bericht
A loaded spring performs simple harmonic motion with an amplitude of 5cm. If the maximum acceleration of the load is 20cm s-1, calculate the angular frequency of the motion
Antwortdetails
Frage 40 Bericht
Antwortdetails
Frage 41 Bericht
Antwortdetails
Frage 42 Bericht
Antwortdetails
Frage 43 Bericht
Antwortdetails
Frage 44 Bericht
Antwortdetails
Frage 45 Bericht
Antwortdetails
Weight of object in air (W_air): 60.0 N
Weight of object in liquid X (W_X): 48.2 N
Weight of object in water (W_water): 44.9 N
The loss of weight in a fluid is equal to the buoyant force, which is equal to the weight of the displaced fluid.
Buoyant force in water: 𝐹buoyant, water=𝑊air−𝑊water=60.0 N−44.9 N=15.1 NFbuoyant, water=Wair−Wwater=60.0N−44.9N=15.1N
Since the buoyant force is equal to the weight of the water displaced and the density of water (ρ_water) is 1 g/cm³ (or 1000 kg/m³), the volume of the object (V) can be calculated using:
𝐹buoyant, water=𝜌water⋅𝑉⋅𝑔Fbuoyant, water=ρwater⋅V⋅g 15.1 N=1000 kg/m3⋅𝑉⋅9.8 m/s215.1N=1000kg/m3⋅V⋅9.8m/s2 𝑉=15.1 N1000 kg/m3⋅9.8 m/s2V=1000kg/m3⋅9.8m/s215.1N 𝑉≈1.54×10−3 m3V≈1.54×10−3m3
Buoyant force in liquid X:
𝐹buoyant, X=𝑊air−𝑊X=60.0 N−48.2 N=11.8 NFbuoyant, X=Wair−WX=60.0N−48.2N=11.8N
Using the same volume V (since the object's volume doesn't change), the density of liquid X (ρ_X) can be calculated:
𝐹buoyant, X=𝜌X⋅𝑉⋅𝑔Fbuoyant, X=ρX⋅V⋅g 11.8 N=𝜌X⋅1.54×10−3 m3⋅9.8 m/s211.8N=ρX⋅1.54×10−3m3⋅9.8m/s2 𝜌X=11.8 N1.54×10−3 m3⋅9.8 m/s2ρX=1.54×10−3m3⋅9.8m/s211.8N 𝜌X≈786.1 kg/m3ρX≈786.1kg/m3
Relative density of liquid X: The relative density (specific gravity) is the ratio of the density of liquid X to the density of water: Relative density=𝜌X𝜌water=786.1 kg/m31000 kg/m3≈0.786Relative density=ρwaterρX=1000kg/m3786.1kg/m3≈0.786
Therefore, the relative density of liquid X is approximately 0.786.
Frage 46 Bericht
Antwortdetails
Frage 47 Bericht
Antwortdetails
Frage 48 Bericht
Antwortdetails
Frage 49 Bericht
Antwortdetails
Frage 50 Bericht
Antwortdetails
Frage 51 Bericht
Antwortdetails
