8 Four students P, Q, R and S each attempt to measure the time period (the time for one complete 090ilation) of a pendulum. The arrows in Fig. 21 show the movements of the pendulum that each
student times
P
end
(1)
Ind
(a) State the student who has chosen the correct movement for one period of a pendulum
student​

A2 µc charge q1 and a 2 µc charge q2 are 0.3 m from the x-axis. a 4 µc charge q3 is 0.4 m from the y-axis. the distances d13 and d23 are 0.5 m. find the magnitude and direction of the resulting vector r. round your answer to the nearest tenth.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.