DB$14$

$"0\mathrm{.}3$

$$

Aer ag $300$

$$

Sreabhann C agus $130$kPa tr$$ ph$$ob$$n aitheantais cothrom$$nach $7$cm ar threoluas $42\mathrm{.}0$ m$/$s$.($a$)$ R$$omh

E

$$

k

$$

$($W$),$ ag glacadh leis an iompar g$$is id$$alach$.($b$)$ M$$ th$$itear an t$-$aer go $400$

$$

C ag br$$ tairiseach, cad $\backslash$Delta

E

$$

k

$$

$=$

E

$$

k

$$

$(400$

$$

C$)-$

E

$$

k

$$

$(300$

$$

C$)?($c$)$ C$$n f$$th a mbeadh s$$ m$$cheart a r$$ go gcaithfidh an r$$ta aistrithe teasa go dt$$ an g$$s i gcuid $($b$)$ a bheith comhionann leis an r$$ta athraithe ar fhuinneamh cin$$iteach$?$ C$\mathrm{.}4$ T$$ann meat$$n isteach i bp$$ob$$n $5$cmID$35$

$$

C agus $12$ barra le me$$ntreoluas $7\mathrm{.}5$ m$/$s agus tagann s$$ chun solais ag pointe $150$ m n$$os $$sle n$$ an g$$il$$n ag $35$

$$

C agus $10$ barra. $($a$)$ Gan aon r$$omhaireachta$$ a dh$$anamh$,$ d$$an na comhartha$(+$ n$-)$ de $\backslash$Delta E a thuar

k

$$

$$

agus $\backslash$Delta E

lch

$$

$$

$,$ nuair is br$$ le $\backslash$Delta $($asraon $-$ ionraon$).$ M$$nigh go hachomair do r$$as$$na$$ocht$.($b$)$ R$$omh $\backslash$Delta E

k

$$

$$

agus $\backslash$Delta E

lch

$$

$$

$($W$),$ ag glacadh leis go n$-$iompra$$onn an meat$$n mar gh$$s id$$alach$."$