Which will have the greatest amplitude and pitch when shaken, a jar half fill with water and 2 marble or a jar with no water and 2 marbles.

a jar with no water and 2 marbles

Explanation:

When a jar is half fill with water and 2 marbles, the amplitude pitch of the sound produced is lower because the water has caused the glass to vibrate slower. When there is no water and two marbles in the jar, the amplitude and pitch is higher because the jar is vibrating faster.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

conduction, convection, radiation