Answer:
Ig =7.2 +j9.599
Explanation: Check the attachment
Answer:

Explanation:
For pressure gage we can determine this by saying:
The closed tank with oil and air has a pressure of P₁ and the pressure of oil at a certain height in the U-tube on mercury is p₁gh₁. The pressure of mercury on the air in pressure gauge is p₂gh₂. The pressure of the gage is P₂.

We want to work out P₁-P₂: Heights aren't given so we can solve it in terms of height: assuming h₁=h₂=h

Answer and Explanation:
The answer is attached below
It’s A 75khz because it’s plus or minus so if u add it would be too much