A girl riding a bicycle along a straight road with a speed of 5 ms−1 throws a stone of mass 0.5 kg which has a speed of 15 ms−1 with respect to the ground along with her direction of motion. The mass of a girl and bicycle is 50 kg. Does the speed of the bicycle change after the stone is thrown? What is a change in speed, if so?

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?