4.0 x 102kgm-3
4.0 x 103kgm-3
1.0 x 103kgm-3
1.0 x 106kgm-3
Correct answer is B
since the object floats, density of liquid = density of object
converting 500cm3 to m3,
500106=5×10−4m3
D = mv
= 25×10−4
=4.0×103kgm−3
0.02
0.08
0.20
0.80
Correct answer is B
μmg = ma
μmg = F - ma
μ x 10 x 10 = 10 - (10 x 0.2)
100 μ =10 - 2
dividing both sides by 100
μ = 8 / 100
μ = 0.08
5.3s
34.5s
41.6s
52.8s
Correct answer is D
power = mgh
0.25 x 103 = 60×10×22t
t = 52.8 sec
3 rev s-1
40 rev s-1
360 rev s-1
2400 rev s-1
Correct answer is C
speed of driverspeeder driven = no. of teeth of driverno. of teeth of driven
120V = 2060
v = 360 rev s-1