physics

A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then?

A. W > U + V B. W = U + V C. W = U - V D. W…

6 years ago

A block of wood of density 0.6 gcm‾³, weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm‾³. Calculate volume of the portion immersed (g = 10ms‾²)

A. 510cm³ B. 340cm³ C. 254cm³ D. 170cm³ Correct Answer: Option B B. 340cm³ Explanation V = M/D = 3.06/10…

6 years ago

Which of the following devices is used to determine the relative density of an acid?

A. manometer B. hydrometer C. hypsometer D. hygrometer Correct Answer: Option B B. hydrometer

6 years ago

The diagram above illustrates trapped air in a syringe placed in water that is gradually heated. It is observed that the piston rises as the temperature of the water rises. Which of the following statements explains this observation?

A. frequency of collision of trapped air molecules with walls of the syringe is more B. molecules of trapped air…

6 years ago

The derived unit of pressure can be expressed as?

A. kgms‾² B. kgm‾¹s‾² C. kgm‾²s‾² D. kgm‾¹s² Correct Answer: Option B B. kgm‾¹s‾²

6 years ago

An electric circuit is connected as illustrated above. Determine the equivalent e.m.f and current flowing through the circuit respectively, neglecting the internal resistance of the cells?

A. 2V, 1.0A B. 2V, 4.0A C. 6V, 0.3A D. 6V, 3.0A Correct Answer: Option A A. 2V, 1.0A Explanation…

6 years ago

The diagram above illustrates a waveform. Which of the point on the waveform are in phase?

A. P and R B. R and T C. P and T D. Q and S Correct Answer: Option D…

6 years ago

The outlet of a bicycle pump is used to inflate a football as illustrated in the diagram above. Why does the pressure of the air inside the pump increases as the pimp handle is slowly pushed downward at constant temperature?

A. momentum of the air molecules are increased B. volume occupied by the molecules is increased C. frequency of collision…

6 years ago

Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagram. Determine the magnitude of the resultant force?

A. 53.N B. 21.0N C. 7.0N D. 5.0N Correct Answer: Option D D. 5.0N Explanation Vertical resultant = 10 -…

6 years ago

A block of wood of mass 5kg is pulled on a platform by a force of 40N as illustrated in the diagram above. If the frictional force, F experienced by the block is 12N, calculate the magnitude of the acceleration of the block?

A. 2.4ms‾² B. 5.6ms‾² C. 8.0ms‾² D. 2.4ms‾² Correct Answer: Option B B. 5.6ms‾² Explanation F + Ma = P…

6 years ago
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