QUESTION: A vessel of volume contains ideal gas at the temperature . After a portion of the gas has been let out, the pressure in the vessel decreased by (the temperature remaining constant). Find the mass of the released gas. The gas density under the normal conditions . To solve this problem, you must have […]
I.E. Irodov: Question Number 2.1 Read More »
QUESTION: A motorboat going downstream overcame a raft at a point ; later it turned back and after some time passed the raft at a distance from the point A. Find the flow velocity assuming the duty of the engine to be constant. To solve this problem, you must have an idea of Kinematics. SOLUTION:
I.E. Irodov: Question Number 1.1 Read More »
QUESTION: Calculate the ratio of the electrostatic to gravitational interaction forces between two electrons, between two protons. At what value of the specific charge of a particle would these forces become equal (in their absolute values) in the case of interaction of identical particle. To solve this problem, you must have an idea of Coulomb’s
I.E. Irodov: Question Number 3.1 Read More »
Where did everything come from? What is our history? In this post, you can get the complete history of our existence. Here, you can find the complete story of the Universe starting from the Big Bang, the formation of stars, and planets, life evolving on Earth, and many more. So, let’s get started. Image Credit:
A Complete History of the Universe (From the Big Bang to Present Day) Read More »
Instantaneous Speed It is the speed of a particle at any instant of time, . If is the distance traveled by the particle in a very small time, , then the instantaneous speed of the particle at that time is given by; That is, it is the rate of change of the distance with respect
Instantaneous Speed, Instantaneous Velocity, and Instantaneous Acceleration Read More »
Activity Suppose you have a gun in your hand and you are going to shoot at a big wooden block (as shown in the animation below). https://eduvigyan.com/wp-content/uploads/2022/03/Activity_eqn-of-kinematics_1_com.mp4 You notice that either the bullet comes out of the block or it fully stopped inside it. It means that the speed of the bullet is continuously decreasing
Equations of Kinematics for a Linear Motion Read More »
When a Golf player hits a Golf ball, a baseball player hits a baseball or a tennis player hits a tennis ball then you can notice that the motion of these balls are of the same kind and it is called a Projectile motion. What is Projectile Motion? When you throw an object at an
When you sit on a moving train and you are looking outside from the window of your train then you see that everything is speeding except your train. And if suddenly another train which is coming from the opposite direction crosses you then the velocity of another train appears to be quite larger than it
In 1687, Isaac Newton revolutionized scientific thinking by formulating the laws of motion and universal gravitation published in his book Principia. Today, more than 300 years later too, if we want to describe the effect of forces on any moving or non-moving things around us then we take the help of Newton’s Laws of Motion.
Newton’s Law Of Motion Read More »
The work-energy theorem states that the change in kinetic energy of an object is equal to the net work done by all the forces on the object. If we divide the forces into three categories, conservative, non-conservative and external forces, then from the work-energy theorem , Where is the work done by the non-conservative force,
Work-Energy Theorem Read More »
