Find the half-life of a radioactive material if after 1 year 99.67% of the initial amount remains. (round your answer to one decimal place.)

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward