Em um recipiente contendo água a 100 °C, coloca-se um bloco de cobre de 200 g a 300 °C. Considerando o calor específico do cobre 0,092 cal/g°C e 540 cal/g o calor latente de vaporização da água, determine a quantidade de vapor que se formará até ser atingida a temperatura de equilíbrio térmico do sistema, sabendo que ainda restará água líquida no recipiente.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

Name the non metal condut electricity