Category: 1. Common Subject

A person walks 3 km east, then 4 km north; the displacement magnitude is A 7 km total B 1

In a straight-line trip, which quantity can be smaller than distance because it measures only start-to-end change A Total path

When a runner completes one full round of a circular track and stops at the starting point, the displacement is

Which statement correctly describes displacement when a person returns to the starting point after walking around A Total path length

A sound wave has speed 340 m/s and wavelength 0.68 m; its frequency is A 50 Hz B 340 Hz

A sound wave has frequency 340 Hz in air; its period is A 0.003 s B 0.03 s C 3

When a guitar string is plucked, the sound is produced mainly by A String vibration B Light reflection C Heat

In a sound wave moving in air, air particles mainly move A Up and down B In circles C Stay

Which statement best explains how sound is produced A By light reflection B By electric charge C By melting solids

A ray strikes a plane mirror at 25°; the angle between incident and reflected rays is A 50 degrees B