Why do some children pass urine during sleep at night until 15 or 16 years of age?

Why do we pass more urine in wet and cold season?

Balu said that , "Plants perform Photosynthesis during day time. They respire during night time ". Do you agree with Balu ? Why ? Why not ?

Plants photosynthesize during daytime and respire during the night. Do you agree to this statement? Why? Why not?

Why do some materials allow electric current to pass through them and why some do not?

Have you seen some birds in your surroundings only during a particular season? Why do they come here?

The following table shows the ages of the patients admitted in a hospital during a year : {:("Age (in years)","Number of patients"),(5-15,6),(15-25,11),(25-35,21),(35-45,23),(45-55,14),(55-65,5):} Find the mode and the mean of the data given above . Copmare and interpret the two measures of central tendency .

An electrolytic cell contains a solution of Ag_(2)SO_(4) and platinum electrodes. Current is passed until 1.6 g. of O_(2) has been liberated at anode. The amonut of Ag deposited at cathode would be

The absolute temperature (Kelvin scale) T1s related to the temperature t_(c) on the Celsius scale by t_(c) = T - 273.15 Why do we have 273.15 in this relation, and not 273.16 ?