If the present units of length, time and mass (m, s, kg) are changed to 100m, 100s, and 1/10kg then
Suppose we employ a system in which the unit of mass equals 100 kg, the unit of length equals 1 km and the unit of time 100 s and call the unit of energy eluoj (joule written in reverse order), then
The length, breadth and thickness of a block are measured as 125.5 cm, 5.0 cm and 0.32 cm respectively. Which one of the following measurements is most accurate
The mass of a box is 2.3 kg. Two marbles of masses 2.15 g and 12.39 g are added to it. The total mass of the box to the correct number of significant figures is
The length of a rectangular sheet is 1.5 cm and breadth is 1.203 cm. The area of the face of rectangular sheet to the correct no. of significant figures is :
Each side of a cube is measured to be 5.402 cm. The total surface area and the volume of the cube in appropriate significant figures are :
Taking into account the significant figures, what is the value of 9.99 m + 0.0099 m
The value of the multiplication 3.124 ×576 correct to three significant figures is
If the value of resistance is 10.845 ohms and the value of current is 3.23 amperes, the potential difference is 35.02935 volts. Its value in significant number would be
Each side a cube is measured to be 7.203 m. The volume of the cube up to appropriate significant figures is
Which of the following does not have the same dimension?
The ratio of the dimension of planck’s constant and that of moment of inertia is the dimension of
Out of the following pair, which one does not have the same dimensions?
The fastest commercial airline service is 1450 mi/h. Find the speed in kmh-1 and ms-1
If M is mass of the earth and R its radius, the ratio of the gravitational acceleration and the gravitational constant is
A force F is given by F = at + bt2 where t is time, what are the dimension of a and b.
The velocity of surface waves depends upon surface tension, coefficient of viscosity and density. The relation is
A spherometer has 20 threads per cm. Its circular scale has 100 divisions. Find the least count of spheometer
If force F = Ke-br/r2 varies with distance r. Then write the dimensions of K and b.
Given X = anbm/pr. The percent error in measurement of a, b and p is 1%, 0.5% and 0.75% respectively. If n = 2, m = 2 and r = 4 then percent error in x is
In a system of units if force F, acceleration A and time T are taken as fundamental units, then the dimensional formula of energy is
Using a meter-stick, a length is measured by a student and he reported it as 0.3655m. The smallest possible division on the scale is -
A student wants to measure the thickness of a single sheet of paper. He measures the thickness of the stack of 75 sheets with a micrometer and registers the reading as 1.16cm. The thickness of a single sheet should be expressed correctly as-
A scientist performs an experiment and takes 50 readings. He repeats the same experiment and now takes 200 readings. By doing so:
