Consider a spring with a rest length i and a spring constant k. this spring has a natural frequency $w0 = \sqt{k}$ (assume spring's mass to be m 1 suppose we place identical positive charges q on the ends of the spring. this system will two have a new natural frequency w now. derive the new expression for w just consider electrostatic effects and assume that the loads are small. you can of course also use harmonic approaches

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct