Showing posts from May, 2023Show All
HSC Result 2023 on 25 May 2023

HSC Result 2023 on 25 May 2023

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 24, 2023

Finally the wait is over for HSC student. Maharashtra State Board have declared the da…

With what terminal velocity will an air bubble 0.4 mm in diameter rise in a liquid of viscosity 0.1 Ns/m² and specific gravity 0.9? Density of air is 1.29 kg/m³ .

With what terminal velocity will an air bubble 0.4 mm in diameter rise in a liquid of viscosity 0.1 Ns/m² and specific gravity 0.9? Density of air is 1.29 kg/m³ .

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 23, 2023

As per the question we can put some of the given data as, diameter D= 0.4mm radius r =…

A horizontal force of 1 N is required to move a metal plate of area 10^-2 m² with a velocity of 2 × 10^-2 m/s, when it rests on a layer of oil 1.5 × 10^-3 m thick. Find the coefficient of viscosity of oil.

A horizontal force of 1 N is required to move a metal plate of area 10^-2 m² with a velocity of 2 × 10^-2 m/s, when it rests on a layer of oil 1.5 × 10^-3 m thick. Find the coefficient of viscosity of oil.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 23, 2023

The data that can be listed from the question is as follows,  Force F = 1N To find, co…

Calculate the viscous force acting on a rain drop of diameter 1 mm, falling with a uniform velocity 2 m/s through air. The coefficient of viscosity of air is 1.8 × 10^-5 Ns/m².

Calculate the viscous force acting on a rain drop of diameter 1 mm, falling with a uniform velocity 2 m/s through air. The coefficient of viscosity of air is 1.8 × 10^-5 Ns/m².

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 23, 2023

As per the question we can list some data as, diameter d = 1mm  velocity v= 2m/s To fi…

In a hydraulic lift, the input piston had surface area 30 cm² and the output piston has surface area of 1500 cm² . If a force of 25 N is applied to the input piston, calculate weight on output piston.

In a hydraulic lift, the input piston had surface area 30 cm² and the output piston has surface area of 1500 cm² . If a force of 25 N is applied to the input piston, calculate weight on output piston.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 20, 2023

As per the given question we can list some given data as Input force F₁ = 25N To find…

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 )

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 20, 2023

As per the given question we can list some data as height h=200m density ρ = 1060 kg/…

A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from a volume of 5 litres to a volume of 10 litres. In doing so it absorbs 400 J of thermal energy from its surroundings. Determine the change in internal energy of system.

A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from a volume of 5 litres to a volume of 10 litres. In doing so it absorbs 400 J of thermal energy from its surroundings. Determine the change in internal energy of system.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 19, 2023

As per the given question the given data can be listed as, Pressure P = 1 atm = 1.013 …

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?

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 19, 2023

Given data from the question can be listed as  dW = 2000J To find , Heat added dQ = ? …

A Carnot refrigerator operates between 250K and 300K. Calculate its coefficient of performance.

A Carnot refrigerator operates between 250K and 300K. Calculate its coefficient of performance.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 17, 2023

The given data that we can list here are,   Hot reservoir temperature    T₁  = 300K Co…

Efficiency of a Carnot cycle is 75%. If temperature of the hot reservoir is 727ºC, calculate the temperature of the cold reservoir.

Efficiency of a Carnot cycle is 75%. If temperature of the hot reservoir is 727ºC, calculate the temperature of the cold reservoir.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 17, 2023

The given data in this question is,  Efficiency η = 75% = 0.75 Hot reservoir T₁ = 727º…

A system releases 130 kJ of heat while 109 kJ of work is done on the system. Calculate the change in internal energy

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 17, 2023

Before we write the given data let us first mention some sign convention that we use w…

Potential energy of a particle performing linear S.H.M is 0.1 π² x² joule. If mass of the particle is 20 g, find the frequency of S.H.M.

Potential energy of a particle performing linear S.H.M is 0.1 π² x² joule. If mass of the particle is 20 g, find the frequency of S.H.M.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 14, 2023

The data available in the sums is,  Joule mass m = 20g = 0.020kg  To find , Frequency …

The total energy of a body of mass 2 kg performing S.H.M. is 40 J. Find its speed while crossing the centre of the path.

The total energy of a body of mass 2 kg performing S.H.M. is 40 J. Find its speed while crossing the centre of the path.

Manoj Jaiswar ( PMJ Sir )
by Manoj Jaiswar ( PMJ Sir ) May 14, 2023

The given data from the question can be listed as, mass m = 2kg Total Energy E = 40J T…