physics

A clinical thermometer is different from other mercury in glass thermometers owing to?

A. the constriction on its stem B. the grade of mercury used in it C. its long stem D. its…

4 years ago

A piece of iron weighs 250N in air and 200N in a liquid of density 1000 kgm‾³. The volume of the iron is?

A. 5.0 x 10-2 m-2. B. 4.5 x 10-2 m-3. C. 2.5 x 10-2 m8. D. 2.0 x 10-2 m-3. Correct Answer: Option C…

4 years ago

A reservoir 500m deep is filled with a fluid of density 850 kgm‾³. If the atmospheric pressure is 1.05 x 105 Nm‾²; the pressure at the bottom of the reservoir is. [g = 10ms‾²]

A. 4.72 x 106 Nm-2 B. 4.36 x 106 Nm-2 C. 4.28 x 106 Nm-2 D. 4.25 x 106 Nm-2 Correct Answer: Option D…

4 years ago

A machine has a velocity ratio of 4; if it requires 800N to overcome a load of 1600N. What is the efficiency of the machine?

A. 60% B. 50% C. 40% D. 2% Correct Answer: Option B = 50% Explanation Efficiency = (M.A)/V.R X (100)/1…

4 years ago

Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them? [G = 6.67 X 10−¹¹ Nm² Kg²]

A. 3.50 x 10-10N. B. 3.71 X 10-8N. C. 3.57 x 10-2N. D. 4.00 x 102N. Correct Answer: Option B…

4 years ago

A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms‾¹. The magnitude of the centripetal force on the car is ?

A. 4.8 x 104 N B. 4.8 x 10³ N C. 1.2 x 10³ N D. 1.2 x 10² N…

4 years ago

A gramophone record takes 5s to reach its constant angular velocity of 4π rads‾¹ from rest. Find its constant angular acceleration.

A. 0.4π rads‾² B. 0.8π rads‾² C. 1.3π rads‾² D. 20.0π rads‾² Correct Answer: Option B = 0.8π rads‾² Explanation…

4 years ago

The unit of moment of a couple can be expressed in?

A. Nm‾¹ B. Nm‾² C. Nm D. Nm² Correct Answer: Option C = Nm Explanation The unit of a couple…

4 years ago

If a convex lens of focal length 12cm is used to produce a real image four times the size of the object, how far from the lens must the object be placed?

A. 10 cm B. 15 cm C. 20 cm D. 25 cm Correct Answer: Option B = 15 cm Explanation…

4 years ago

A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion

A. 2.5 ms¯¹ B. 3.0 ms¯¹ C. 4.0 ms¯¹ D. 4.5 ms¯¹ Correct Answer: Option A = 2.5 ms¯¹

4 years ago
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