Trophe of Renais

I am a tiny device, but I can pack a powerful punch. When things get too hot, I am the first line of defense. What am I?

I cannot go left, I cannot go right. I am forever stuck in a building over three stories high. What am I?

I have a ring but no hands. I used to be plugged into a wall but now I follow you everywhere. What

am I?

I am a device that allows current to flow in only one direction. I am often used to convert AC power

to DC power. What am I?

I am an electronic component that is used to store and retrieve digital information. I consist of a

grid of tiny electrical circuits that can be switched on or off to represent 1's and 0's. What am I?

When I point up its bright, but when I point down its dark. What am I?

What can be measured, but has no length, width, or height?

What two periodic elements, when combined, heal?

I was once an old massive star and soon I will be a brightly

colored gas cloud, but for now I am a massive explosion. What

am I called?

I am a component that generates an electrical signal when its exposed to light. I am often used in

electronic circuits to detect light or to convert light into electrical energy. What am I?