Read and order the words in the sentences. ) The play children in the happily park.
slowly Elephants in the park. walk
the Sometimes environment treat badly. people
friends Tilly and songs loudly. her sing
Footballers catch to the ball. quickly run​

v=c/л

кпд=nhс/iuл=

=5*10(13)*6.63*10(-34)*3*10(-8)м/с/5*10(4)в*2*10(-3)а*10(-9)м=9*10(-4)=0.09%

m=rv=7800кг/м3*0.7м3=5460кг  масса рельса

f=mg=5460кг*9.8н/кг=54600н  сила тяжести

fa=rgv=1000кг/м3*9.8н/кг*0.7м3=7000н сила архимеда

fуд=f-fa=54600-7000=47600н=47.6кн-искомая сила

длина волны связана с частотой:   λ=c/f=3*10(8)м/с/106,2*10(6)=2,83 м

s=vt/2=3*10(8)м/с*150с/2=225*10(8)м