Show that when a body is suspended from a spring and is pulled down a little and released, it executes S. H.M. Also find an expression for its time period. Does it depend on acceleration due to gravity ?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

Work = force × a. work b. energy c. distance d. momentum

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.