A healthy adult human excretes (on an average) _______ gm of urea/day.

The boiling points for aqueous solutions of sucrose and uren are same :11 constant temperature. If 3 gm of urea is dissolved in its 1 litre solution, what is thc weight of sucrose dissolved in its 1 litre solution? (Urea - 60 gm//mole, sucrose = 342 gm/mole]

Every gram of wheat provides 0.1 gm of proteins and 0.25 gm of carbohydrates. The corresponding values of rice are 0.05 gm and 0.5 gm respectively. Wheat costs Rs. 4 per kg and rice Rs. 6. The minimum daily requirements of proteins and carbohydrates for an average child are 50 gm and 200 gms respectively. In what quantities should wheat and rice be mixed in the daily diet to provide minimum daily requirements of proteins and carbohydrates at minimum cost ?

On an average a human heart is found to beat 300 times in a minute. Calculate its frequency and period.

On an average, a human heart is found to beat 75 times in a minute. Calculate its frequency and period.