A pressão atmosférica considerada normal tem, em unidades SI, o valor aproximado de 101 000 Pa. Calcula o valor da força que é exercida pelo ar atmosférico numa área de 600 cm2.

The least penetrating form of radiation is

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents