A glass plate of length 10 cm, breadth 4 cm and thickness 0.4 cm weighs 20 grams in air. It is held vertically with longest and shortest side horizontal and half the plate immersed in water. ( Surface tension of water = 70 dyne/cm) (gf represent gram-force)
Column 1 | Column 2 | ||
1 | Buoyant Force | a | 20 gf |
2 | Force due to surface tension | b | 8 gf |
3 | Apparent weight of plate | c | 1.49 gf |
d | 13.49 gf | ||
e | 11.51 gf |