Question

1. What are we uisadvantages I usmy 18SSII TULIS!
Q8. The heat produced by a fuel when burnt in a boiler is 80000kJ. If the calorific value of the fuel is 25000kJ/Kg,
find the amount of coal burnt.
Q9. Make a sketch of the human nerve cell. What function do nerve cells perform?
Q10. Can a woman with a blocked fallopian tube give birth to a baby ?How?​

Answer 1

The amount of coal produced is 3.2 Kg

Explanation:

Given data:

• Amount of heat produced = 80000 KJ
• The calorific value of the fuel = 250000 KJ/Kg
• To Find: The mass of coal burnt "m" = ?

Solution:

The formula to calculate mass is given below

Calorific value = heat produced / mass of coal

Mass of coal = heat produced / calorific value

Mass = 80000 / 25000

Mass = 3.2 Kg

Hence the amount of coal produced is 3.2 Kg