Решение. T0=2*3,14*(L/g0)^0,5; T=2*3,14*(L/g)^0,5; g0=G*((M)/(R^2)); g=G*((M)/((R+h)^2));N0=t0/T0; N=t0/T; dN=N0-N; dt=dN*T0; dt=t0*(1/T0-1/T)*T0; dt=t0*(1-T0/T); dt=t0*(1-( g/g0)^0,5); dt=t0*(1-R/(R+h)); t0=24*3600; R=6400000; h=5000; dt=24*3600(1-6400000/640500)=67,447(c).