Asolid steel ball with radius 3.00 cm and an aluminum ring with inner radius 2.98 cm are initially at 20 °c. if the ball and ring are heated together, at what common minimum temperature will the ball fit through the ring? a. 226 °c b. 403 °c c. 461 °c d. 552 °c e. 583 °c

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

One kind of e-book display consists of millions of very small spheres that float in a thin fluid layer between two conducting transparent plates. each sphere is black on one side and white on the other, and possesses an electric dipole moment directed from the white side to the black. when an electric field is applied between the plates, the spheres rotate so that their dipole moment lines up with the field. depending on the fields direction, either the black or the white sides of th espheres can be made visible.the dipole moment of the spheres can be modeled as two opposite charges of magnitude 3.5 x 10^-15 c, separated by a distancce of 100 micrometers (um). what is the maximum possible torque on a sphere if the electric field between the transparent plates is 4.0 x 10^5 n/c

Provide a well-written hypothesis that can explore the function of the counterweight in a trebuchet.