I would say False because hidden doesn't mean delete. Hope that makes since.
Explanation:
1. Wear your headphones while listening to your recording: It is important to make sure there are no echoes or background noises in the room.
2. Pay attention to your surroundings: It is important to eliminate any unwanted motions or unwanted noises associates with motion.
3. Use a tripod or a table microphone: It is important not to be distracted by background noise or confuse it with background noise from your recording.
<span>A good key is one that is longer than the text being protected. It should have a combination of letters and digits, example, "AGR54SH6J87KOP" is a good key. A bad key is one that is predictable,or contains only letters. Some examples of bad keys are "GGGGGG" or "MYPASSWORD"</span>
Explanation:
Assuming no loss in energy when going up or down (i.e.neglect air resistance), the energies are the same at the maximum height as well as the ground.
(II) the initial energy is all kinetic (so is the final energy when it hits the ground), so
KE = (mv^2)/2 = 0.5kg * ( (15^2) m^2/s^2 ) /2 = 56.25 J.
(i) PE at top = KE at bottom = 56.25 J.