Pon 21. A wooden block weighing 30N and having a
length of 3 m, wiath of 2 m and height of 1.5 mis
placed on a table. The pressure exerted by the
wooden block on the surface of the table is

The discovery of the electron as a subatomic particle was a result of

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature