Two heavy spheres each of mass 100kg and radius 0.10m apart on a horizontal table. What is the gravitational force and potential at the midpoint of the line joining the centre of the spheres? Is an object placed at that point in equilibrium? If so, the equilibrium is stable or unstable.

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?