1-) Uma carga elétrica Q é colocada em um ponto do espaço vazio. Este sistema elétrico tem energia potencial elétrica? Explique.
2-) Sejam duas cargas elétricas de valores iguais a 2x10(elevado a -6) C e 4x10(elevado a -4) C separadas por uma distância igual a 3m. Quanto vale a energia potencial elétrica deste sistema?

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?