Patru elevi au măsurat aria unui caiet şi au găsit valorile: A 1 =14,50 cm 2 , A 2 = 14,10 cm 2 , A 3= 14,40 cm 2 şi A 4 = 14,60 cm 2 . Media aritmetică a măsurătorilor este…………………………
Cea mai mică eroare de măsurare faţă de valoarea medie o are elevul…………….

Asatellite that goes around the earth once every 24 hours iscalled a geosynchronous satellite. if a geosynchronoussatellite is in an equatorial orbit, its position appearsstationary with respect to a ground station, and it is known as ageostationary satellite find the radius rof the orbit of a geosynchronous satellite that circles the earth.(note that ris measured from the center of the earth, not the surface.) you mayuse the following constants: the universal gravitational constant g is 6.67 \times 10^{-11}\; {\rm n \; m^2 / kg^2}. the mass of the earth is 5.98 \times 10^{24}\; {\rm kg}. the radius of the earth is 6.38 \times 10^{6}\; {\rm m}.