A certain body weighs 22.42 g and has a measured volume of 4.7 cc.The possible error in the measurement of mass and volume are 0.01 g and 0.1 cc.Then maximum error in the density will be
22%
2%
0.2%
0.02%
The unit of length convenient on the atomic scale is known as an angstrom and is denoted by Å. 1Å = 10-10 m.The size of the hydrogen atom is about 0.5 Å.What is the total atomic volume in m3 of a mole of hydrogen atoms?
3 x 10-6 m3
3 x 10-7 m3
3 x 10 -17m3
3 x 10-10 m3
If an instrument gives nearly equal values in repeated measurements, it possess
Accuracy
Precision
Both accuracy and Precision
Sensitivity
Which of the following possess a unit but has no dimensions?
Angular Frequency
Angle
Stress
Strain
The dimensional formula of viscosity
[MLT-1]
[M1L-3T-1]
[ML-1T-1]
[ML-1T1]
The dimensional formula for acceleration is
[M0LT-1]
[MLT2]
[MLT]
[M0LT-2]
The maximum and minimum temperatures at a place are(40.6 ± 0.3)°C and (32.4 ± 0.2)°C.Calculate the difference in the temperatures with error limits.
(8.2 ± 0.5)°C
(8.0 ± 5.0)°C
(8.2 ± 5.0)°C
(8.0 ± 0.5)°C
If x= at +bt2 ,where x is the distance travelled by the body in kilometer while t is the time in second,then the unit of b is
km/s
km s
km/s2
km s2
Turpentine oil is flowing through a tube of length l and radius r.The pressure difference between the two ends of the tube is p.The viscosity of the oil is given by
η = p(r2-x2) / 4vl
where v is the velocity of oil a distance x from the axis of the tube.The dimensions of η are
[M0L0T0]
[ML2T-2]
The dimensions of angular velocity are
[ML-1T-2]
[M0L0T-1]
