Bên trong hình trụ giới hạn bởi ρ = 2, -3 < z < 1 đặt trong không gian tự do có điện thế V = 180ρ + 10ρsinφ (V). Xác định V, Eሬ⃗, Dሬ⃗, ρv tại P(1, 30o
, 0.5)

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

The force will determine the acceleration.

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.