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 wide range of temperatures
A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm-3. the volume of the iron is?
- A. 5.0 x 10-3 m-3
- B. 4.5 x 10-3 m-3
- C. 2.5 x 10-3 m-3
- D. 2.0 x 10-3 m-3
A reservoir 500 m 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
A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine?
- A. 60%
- B. 50%
- C. 40%
- D. 2%
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 Kg\(^{-2}\)]
- A. 3.50 x 10-10N
- B. 3.71 x 10-8 N
- C. 3.57 x 10-2N
- D. 4.00 x 102N
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
A gramophone record takes 5s to reach its constant angular velocity of 4\(\pi\) rads-1 from rest. Find its constant angular acceleration.
- A. 0.4\(\pi\) rads-2
- B. 0.8\(\pi\) rads-2
- C. 1.3\(\pi\) rads-2
- D. 20.0\(\pi\) rads-2
The unit of moment of a couple can be expressed in?
- A. N m-1
- B. N m-2
- C. N m
- D. N m2