If we select the unit of acceleration as 980cm/s2 and unit of velocity as 3x1010cm/s the unit of time will be
4.6x107s
3.6x106s
3.06x107s
4.66x107s
The unit of energy in SI system is:
Electron Volt
Calorie
joule
Erg
In a SONAR system, the duration between sending of a search wave and receiving back of the reflected wave from an enemy submarine is 77s.If speed of sound in water is 1450 m/s,find the distance of the energy submarine.
55.8km
65.8 km
52.8 km
62.8 km
The density of a cube is measured by measuring its mass and length of its sides.If the maximum error in the measurement of mass and length are 4% and 3% respectively,the maximum error in the measurement of density will be
7%
9%
12%
13%
The volume of a cube of side 1 cm is equal to _____ m3.
106
10-6
105
10-5
The dimensional formula for frequency is
T
T-1
T-2
T2
Which of the following will have the dimensions of time?
LC
R / L
L / R
C / L
The dimensional formula for Young's modulus is:
[ML-1T-1]
[M0LT-2]
[ML2T-2]
[MLT-2]
A vernier Callipers with 1MSD = 1cm has 5 divisions as the vernier. The least count is
0.8mm
0.8cm
0.4cm
0.5cm
One astronomical unit is
6.024x1026 m
9.46x1015m
1.496x1011m
1.58x105m
