When a mass is suspended from the end of a spring, it lengthens. For the same mass, the lengthening varies according to the spring used. The spring A opposite measures 8 cm. It lengthens. 1 cm for each 100g mass that is suspended at its end. The spring B measures 5 cm and extends by 1 cm for each 75g mass that is suspended at its end. It is possible to suspend the same mass to these two springs so that they are of the same length, once extended. What is this mass?

Will you chech and finish these for me, because i am stumped with them.

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

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