Measurement

One of the combinations from the fundamental physical constants is `"hc"/"G"`. The unit of this expression is ______

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of the acceleration due to gravity is ______

Which of the following pairs of physical quantities have the same dimension?

The density of a material in the CGS system of units is 4 g cm^-3. In a system of units in which the unit of length is 10 cm and unit of mass is 100 g, then the value of density of the material will be ______

Planck’s constant (h), speed of light in vacuum (c), and Newton’s gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?.

Briefly explain the types of physical quantities.

How will you measure the diameter of the Moon using the parallax method?

Explain the use of a screw gauge and vernier caliper in measuring smaller distances.