Intr-o grupa, 3 elevi au masurat lungimea unui creion si au obtinut urmatoarele valori: 16,2 cm;16,5 cm si respective 16,1 cm. Aflati valoarea medie a valorilor masurate si erorile obtinute de fiecare elev. VA ROG!!!REPEDE.

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.