Why are the classification systems changing every now and then?

Discuss how electron affinity of elements changes along a period and down a group.

How will the tendency to lose electron change in a period?

Why has our understanding of plant kingdom changed over time?

If an object is said to have undergone change in its state of motion, what do you mean by it?

How does the atomic radius change as you go from left to right in a period?

Assuming the earth to be a perfect spherical conductor of radius 6.4 xx 10^(6) m, find the capacity of the earth. How capacity of a parallel plate condenser changes with change of area of overlapping ?

Find the magnitude of emf induced in a 200 turn coil with cross sectional area of 0.16 m if the magnetic field through the coll changes from 0.10 weber/m2 to 0.50 weber/m^2 at a uniform rate over a period of 0.02 second.

How many times must a man toss a fair coin, so that the probability of having atleast one head is more than 80%?

Principal = Rs 1000, Rate = 8% per annum. Fill in the following table find which type of interest (simple or compound) changes in direct proportion with time period.