Asphere of radius a in free space contains charge of density rhov=rho0r/a, where rho0 is a constant. (a) find the electric field intensity, ei, inside the sphere. (b) find the electric field intensity, eii, outside the sphere. (c) a spherical shell of radius b is positioned concentrically around the sphere. what surface charge density, rhos, must exist on the shell so that the electric field at locations r > b is zero? (d) what electrostatic force per unit area is exerted by the solid sphere on the spherical shell?

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units