Were is conflicting testimony in a court
case. a police officer claims that his
radar monitor indicated that a car
was traveling at 1766 kmin (llomi/h).
the driver argues that the rodar must have
recorded the relative velocity because
he was only going 88km/h (55mi/h).
is it possible that both are telling
the truth? could ondbelying? prepore
scripts for expert witnesses, for both
the prosecution and the datensc, that
use physics to justify their positions
before the jury. create visual aids to
be used as tvidence to support the
different arguments.

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

Determine the maximum r-value of the polar equation r =3+3 cos 0

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒