Is it possible to have length and velocity both as fundamental quantities? Why?

How many astronomical units make one metre?

How many amu make 1 kg?

Human heart is an inbuilt clock.comment.

Define one Barn.How it is related with metre?

Calculate the length of the arc of a circle of radius 31. cm which subtends an angle of \(\frac { \pi }{ 6 } \) at the centre.

Name the device used for measuring the mass of atoms and molecules.

Are inertial and gravitational mass of a body different from one another?

Which of the following length measurement is most accurate and way?
(i) 2.0 cm  
(ii) 2.00cm
(iii) 2.000cm

Precisions describes the limitations of the measuring instruments. It is statements false?

A jeweller put a diamond weighing 5.42 g in a box weighing 1.2 Kg. Find the total weight of the box and the diamond to correct number of significant figures.

Express an acceleration of 10 m/s² in km/h².

A student measures the thickness of a human hair by looking at it through a microscope of magnification 100. He makes 20 observations and finds that the average width of the hair in the field of view of the microscope is 3.5 mm. What is the estimate on the thickness of hair ?

The photograph of a house occupies an area of 1.75 cm² on a 35 mm slide. The slide is projected on to a screen, and the area of the house on the screen is 1.55 m² . What is the linear magnification of the projector-screen arrangement.

How many metric tons are there in teragram?

What is common between bar and torr?

The angle subtended by the moon at a point on the earth is 0⁰31'. If the distance of the moon from the earthis 3.84 x 10⁸m. Find the diameter of the moon.

In CGS system, the value of Stefan's constant \(\left( \sigma \right) \) is 5.67 x 10^-5  ergs^-1cm^-2K^-4. Write down its value in SI units.

The sides of a rectangle are \((10.5\pm 0.2)\) cm and \((5.2\pm 0.1)\) cm. Calculate its perimeter with error limits.

The radius of gold nucleus is 41.3 fermi. Express its volume in m³

The normal duration of ISc Physics Practical period in Indian colleges is 100 minutes. Express this period in microcenturies. 1 microcentury = 10^-6x  100 years. How many microcenturies did you leep yesterday?

Specific resistance \(\rho \) of a thin circular wire of radius r in cm, resistance R in \(\Omega \) and length L in cm is given by \(\rho =\left( { \pi r }^{ 2 }R \right) /L.\)If \(r=(0.26\pm 0.01)\)cm,\(R=(30\pm 2)\Omega \)and \(L=(75.00\pm 0.01)\) cm, find the percentage error in  \(\rho \). 

The diameter of a wire as measured by a screw gauge was found to be 1.328, 1.330, 1.325, 1.334 and 1.336 cm. Calculate diameter of wire.