2. Una sfera conduttrice di raggio R=3.7 m ha una densità superficiale di carica pari a 5,7 uC/m². Calcola l'intensità del campo elettrico:
a) in un punto distante R/2 dal centro
b) in un punto distante 2R dal centro
3.
Due cariche, ciascuna di +3,70 uc, sono poste nei due vertici consecutivi di un quadrato di lato
1.2 m, come mostrato in figura. Determina l'intensità e la direzione del campo elettrico
risultante nel terzo vertice del quadrato, indicato come 3 nella figura.

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter