Use a trial function of the form with as a variational parameter to calculate the ground state energy of the harmonic oscillator. Compare your result with the exact energy. Why do you think this trial function works so well

A5 nc point charge is at the origin and a second 3 nc point charge is on the x-axis at x = 0.8 m. find the magnitude and direction of the electric field on the x-axs at x = 0.2 m. you may express the direction by letting positive field mean the positive x direction

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

Explain vector addition, triangle method and parallelogram method