A nonconducting sphere has radius R = 2.79 cm and uniformly distributed charge q = +2.11 fC. Take the electric potential at the sphere's center to be V0 = 0. What is V at radial distance from the center (a) r = 1.10 cm and (b) r = R? (Hint: See an expression for the electric field.)

Aspaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. plants will be grown to provide oxygen and to recycle carbon dioxide. since the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed. 13) what wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure? a) full-spectrum white light b) green light c) a mixture of blue and red light d) uv light