The dome of a Van de Graaff generator has a radius of 0.10 m. An electron in a hydrogen atom is located at a distance 0.20 m from the center of the dome. Determine the magnitude of the positive charge needed on the dome to exert a force on the electron that is equal to the force exerted by the atom's nucleus on the electron.

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)