A1.34 kg ball is connected by means of two massless strings, each of length l 1.70 m, to a vertical, rotating rod. the strings are tied to the rod with separation d = 1.70 m and are taut. the tension in the upper string is 35 n. what are the (a) tension in the lower string, (b) magnitude of the net force on the ball, and (c) speed of the ball? (d) what is the direction of ?

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy