Finding the magnetic field from the electric field: EM waves
Question: The electric field of an electromagnetic wave is given as \[ \vec{E}=(E_{0x}\vec{x} + E_{0y}\vec{y})\sin(\omega t – kz + \phi) […]
Category: Physics
The free-fall human and its kinematics
Question: A stunt woman jumps off from a 202-m high building onto a cushion having a thickness of 2.00 m. […]
Invariance of physics under Galilean transformation
Question: Physics laws cannot be altered by the observer’s frames of reference. The transformation from a lab reference frame to […]
Some specific gravitational potential energy and its force
Question: Newtonian theory of gravity can be modified at short range. Such potential energy between two objects is given as […]
Magnetic fields created by a parallel circuit with resistors
Question: The wire splits into two ways, which are bent circularly with radius of \(a\). The upper half wire has […]
Wave equation of the horizontal spring motion
Question: An object attached to a spring moves on a horizontal frictionless surface. This is a harmonic motion with amplitude […]
RC circuit with a DC power supply when the resistances connected in parallel
Question: Consider an RC circuit with a DC voltage supply as shown in the figure. There are four identical resistors […]
Speed of sound in water: The wave speed in different media
Question: The bulk modulus of water is 2.04\(\times\)10\(^9\) Pa. The frequency of a water wave is found to be 262 […]
Damped oscillation of a spring motion: Linear differential equation
Question: A 0.400-kg bob is attached to a spring of its force constant \(k=200\) N/m and this motion is subject […]
Hydrogen molecules in thermal and quantum system
Question: There are hydrogen molecules contained in a closed system by contacting a heat bath at \(T=300\) K. Find the […]