How much heat must be removed to freeze a tray of ice cubes if the water has a mass of 40.0 g? (the molar heat of fusion of water is 6.01 kj/mol.)

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be