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secondary 3 | E Maths
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Help Charleen Tang! Anyone can contribute an answer, even non-tutors.
Physics qn pls help!! Thank you :)
Date Posted: 6 years ago
Views: 387
(i) 70 cm Hg = 9 520 000 Pa
(ur ans is correct.)
(ii) 70-55 = 15 cm Hg
(b) draw the level at the same vertical height of 55 cm from surface of mercury.
Reasons:
1. pressure of gas inside Q remains unchanged
2. no leakage of gas from Q
so liquid pressure unchanged
3. vertical height h is dependent on liquid pressure, density of mercury ρ and gravitational field strength g, all of which remain unchanged.
hence, vertical height h remains unchanged at 55 cm.
(ur ans is correct.)
(ii) 70-55 = 15 cm Hg
(b) draw the level at the same vertical height of 55 cm from surface of mercury.
Reasons:
1. pressure of gas inside Q remains unchanged
2. no leakage of gas from Q
so liquid pressure unchanged
3. vertical height h is dependent on liquid pressure, density of mercury ρ and gravitational field strength g, all of which remain unchanged.
hence, vertical height h remains unchanged at 55 cm.
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