A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate a) the frequency b) the period.

After going through the question, we can list the data as velocity v= 340m/s wavelength λ = 1.7m  To find a) frequency n = ?              b) period T = ? Solution – velocity can be written as  v = n x  λ  n = v /  λ  n = 340…

Find the pressure 200 m below the surface of the ocean if pressure on the free surface of liquid is one atmosphere. (Density of sea water = 1060 kg/m³ )

 After going through the question we can list some data as height h=200m density ρ = 1060 kg/m³ Atmospheric pressure P₀ = 1.013 x 10⁵ N/m² acceleration due to gravity g = 9.8m/s² To find, Pressure below 200m P = ? Solution – Absolute pressure , P = P₀ +  ρgh P = 1.013 x…

An ideal gas is taken through an isothermal process. If it does 2000 J of work on its environment, how much heat is added to it?

After going through the question, we can list some data as, workdone dW = 2000J isothermal process dU = 0 To find , Heat added dQ = ? Solution –  From first law of thermodynamics we have dQ = dU + dW In the question it is given that the gas is taken through isothermal…

A simple pendulum of length 100 cm performs S.H.M. Find the restoring force acting on its bob of mass 50 g when the displacement from the mean position is 3 cm.

As per the given question, we can list out the given quantity Length L = 100 cm = 1m, mass m = 50 g = 50 x $10^{-3}$ kg displacement x = 3 cm = 0.03m , g = 9.8 m/$s^2$ To find = Restoring force, F = ? Solution – Restoring force, F =mg…

An object is dropped from a height of 20m above the ground what will be its speed just before it hits the ground?

The method that we using here is of energy conservation. Let us assume the mass of the object as m kg Since the object is placed at height of 20 m above the ground, it possess potential energy . It is given by PE = m x g x h = 20 mg Let us…

What are transverse waves and longitudinal waves

Transverse Waves Definition – A wave in which particles of the medium vibrate in a direction perpendicular to the direction of propogation of wave is called as transverse waves .Example – Wave produced on rope. Characteristics of transverse waves👉 All particles of the medium in the path of the wave vibrate in the direction perpendicular…

Difference between binding energy and escape energy of a satellite

Let us first start with defining what is a satellite. A satellite is a moon, planet or a machine that orbits a planet or star. Binding Energy for a satellite Since they are moving in an orbit, so definitely there is an energy that is keeping the satellite bounded with the planet. The minimum amount of…

What are eddy currents or Foucault current

Whenever a conductor or a part of the conductor is moved in a magnetic field such that it is cutting the magnetic field lines or placed in a changing magnetic field the free electrons in the bulk of the metal start circulating in closed paths equivalent to current loops. These loop currents resembles eddies in a fluid stream & hence…