The barometer question. The answer is B, it is the same height. Stubborn people can google it.
The echo question. The correct wall is the one ALL THE WAY at the right near the top.
The fuse and circuit breaker. Both are on the live wire.
The fuse. Its 1A.
The meter rule is the one with 3 decimal places. 0.761m.
AND im pretty sure the fire one is C, the air is less dense at higher temperatures.