If the radius of the path of electron 9.1x10kg is 0.28 m moving in magnetic field of 6x104T perpendicular to it. Calculate its energy in Kev and what is its frequency?

The softest and hardest minerals are: softest hardest

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory