physical measurements

knowing that the viscosity = ad/v ( where a is the area , d is the displacement , v is the velocity) mention its dimensional formula
L2T
LT
MLT
which of the following is the dimensional formula of the mass
M-3LT
M1LT0
M1L0T0
M-1L0T0
which of the following is the best statement to describe the density
it's the product of both mass and volume of the object
it's the mass of the object per unit volume
it's the distance covered in unit length
it's the mass of the body divided by its velocity
mention the measuring unit of the density
kg.km-3
kg/km-3
kg.m-3
kg/m-3
7 mm + 3 cm = ....................m
0.037
0.073
0.37
0.73
50 x 106 micrometer = ............m
1
5
50
0.5
0.1 mg = 10x kg then the value of x is
5
3
-7
10
which of the following is an environmental caused error
zero error
demagntization
improper tool
sensitive balance error due to air currents
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