Proving the charges of proton, neutron, and pi meson
Question: Consider a proton, a neutron, and \(\pi\) mesons. These are also called hadrons which are constructed with quarks. Particularly, […]
Category: Physics
Finding the work function and the kinetic energy: Photoelectric effect
Question: 450-nm (450\(\times\)10\(^{-9}\) m) wavelength light is incident on sodium surface for which the threshold wavelength of the photoelectrons is […]
AC circuit: Finding the frequency of the power supply
Question: There is a AC circuit with a resistor \(R=50 \Omega\). When the time is zero, the voltage is equal […]
Physics of a spring: Relationship between potential energy and work
Question: A spring is stretched after 4.0-kg object is hung on it vertically. The displacement is measured as 0.020 m. […]
One dimensional problem on quantum mechanics: Infinite square well potential
Question: There is an infinite potential well of width \(a\) for a quantum system. Find the ground state energy. Answer: […]
One dimensional quantum problem: A particle into the step potential
Question: Find the coefficients of transmission and reflection for a particle incident on the potential shown. The particle has energy, […]
How much is it shortened?: Lorentz contraction
Question: A 2.00-m stick is moving in one direction, and the length is observed as 1.00 m in the laboratory […]
Ballistic pendulum: The conservation of energy and momentum
Question: A 0.010-kg bullet is fired toward a 2.0-kg pendulum. The bullet is sucked in the pendulum block and both […]
Magnetic field by a circular ring with current flow: Calculus based
Question: As shown in the figure, there is a circular coil with current flow, \(I\). Knowing that the radius is […]
When one rotating disk contacts with another disk: Conservation of angular momentum
Question: A solid cylinder with a moment of inertia, \(I_0\), rotates about its center at an angular velocity of \(\omega_0\). […]