1400 kgm-3
1250 kgm-3
500 kgm-3
1000 kgm-3
Correct answer is B
Weight of glycerine displaced = weight of water dispalced
Mgh glycerine = Mgh water
Pvgh glycerine = Pvgh water
0.4V P glycerine = (0.5v)/v.4v P water = 1.25
(Polycerine)/p water =
But density of substance = relative density x density of water = 1. 25 x 1000kgm3 = 1250kgm-3
If a load of mass 10N stretched a cord by 1.2cm, what is the total work done?
6.0 x 10-2J
7.6 x 10-2J
1.8 x 10-2J
6.6 x 10-2J
Correct answer is A
Work done on a stretched cord
= Average force x extension
= \(\frac{1 \times 10 \times 0.012}{2}\)
= 6.0 x 10\(^{-2}\)J
I and III only
II and III only
III and IV only
I and II only
Correct answer is C
pressure in fluid is given by P = hpg.
∴ fluid pressure depends on height of liquid column, h, density of liquid p and acceleration of free fall g. it is therefore independent of type of container and constituents of the liquid.
3.0
3.1
3.2
2.0
Correct answer is D
V.R = \(\frac{1}{sinθ}\)
= \(\frac{1}{sin 30°}\)
= \(\frac{1}{0.5}\)
= 2
0.8
0.4
1.0
0.6
Correct answer is D
coefficient of friction
= \(\frac{F}{R}\)
=\(\frac{F}{mg}\)
= \(\frac{500}{80 \times 10}\)
= 0.625