If a spherical metal bob of radius 3cm is fully immersed in a cylinder containing water and the water level rises by 1cm. What is the radius of the cylinder?
A. 12cm B. 1cm C. 3cm D. 6cm Correct Answer: Option D – 6cm Explanation If the bob is fully immersed in the water, then the volume of water displaced will be equal to the volume of the bob = 4/3πr3, where r is the radius of the If the bob is fully immersed in...
A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to?
A. its kinetic energy on the ground B. twice its initial potential energy C. its initial potential energy D. half its initial potential energy Correct Answer: Option D – half its initial potential energy Explanation At the height of 10m, its total energy is...
The colours seen on soap bubbles are due to?
A. Diffraction B. Refraction C. Dispersion D. Interference Correct Answer: Option D – Interference
If the total force acting on a particle is zero; the linear momentum will?
A. Increase B. Decrease C. Be Constant D. Increase then decrease Correct Answer: Option C – Be ConstantProducts
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