Answer:
50% of it .
Explanation:
50% of it is illuminated by the Sun.
The answer is C) a rolling bowling ball because kinetic energy is the energy of movement and potential energy is the energies of the others, since there are not in movement. i hope this helps.
initial height of the pole vaulter = 4.2 m
height of the pole vaulter just before it touch the pad = 80 cm
so the total displacement of pole vaulter just before he will touch the pad = 4.2 - 0.80 = 3.4 m
now by kinematics




now after this he will come to rest after compressing the pad by 50 cm
so again we can use kinematics to find its acceleration



so here its acceleration will be - 66.64 m/s^2
Moles Pbl2 = 0.8628 g : 461.01 g/mol = 0.001871
moles I = 2 x 0.001871 = 0.003742
[I-] = 0.003742/ 0.0429
= 0.0872 M