Answer:
(a) 49.0 mm
Explanation:
#First we need to calculate the height of the mercury arm:
Reduced pressure is 715.7torr, Initial Pressure is 797.3torr, Required pressure is:
The difference in the two arms will give the pressure difference between the gas placed in the flask attached to an open-end mercury manometer.

Hence the height of the mercury in the arm is 49.00mm
Answer:
225 m
Explanation:
= Frequency of the T wave = 6.8 Hz
= Speed of sound in seawater = 1530 ms⁻¹
= Wavelength of the T wave
we know that, frequency, speed and wavelength are related as


Inserting the values, we get

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