A tiny particle of density 3275 kg/m3 is at the same distance from the Sun as the Earth is (1.5 1011 m). Assume that the particle is spherical and perfectly reflecting. What would its radius have to be for (the force due to) the outward radiation pressure on it to be 1% of the inward gravitational attraction of the Sun? (Take the Sun's mass to be 2.0 1030 kg. The intensity of the Sun at this distance from the Sun is 1.4 kW/m2.