A standing wave pattern along a taut string shows a spacing of $16\mathrm{.}0$ cm between adj

acent anti$-$nodes and a speed of $40\mathrm{.}0$ mis. Determine try.e wavelength and frequency.

point charge is at the origin, and a second $-5\mathrm{.}00$ nC

point charge is on the x

$-$axis at x

$=0\mathrm{.}800$ m$.$ Find the electric field $($magnitude and direction$)$ at the point on the x

$-$axis where x

$=0\mathrm{.}200$ m

$.$