Physics
In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch?

To prevent the steam pressure from bursting open the pouch
To allow the microwaves to get into the food through the holes
To allow the heat to get into the food through the hole
To allow the aroma of the food to come out through the holes

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Physics
An integrated circuit is more advantages than a coventional circuit because

They make the electric equipments more reliable and easier for servicing
If a part of the integrated circuit fails the entire circuit is simply replaced
A faulty part of a conventional circuit may be difficult to locate and repair
All listed here

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