Joshua programs a robotic arm to place a block in a box by following the sequence of commands in the table. A 2-column table with 4 rows. The first column labeled step has entries 1, 2, 3, 4. The second column labeled command has entries, grip block, lift block 10 centimeters, hold for 20 seconds, release block. During which step does the robotic arm do work on the block? Step 1 Step 2 Step 3 Step 4.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

number of electrons for neutral cl

i don't understand. explain it clearly