A system of three point particles of equal masses 45 gm are initially connected by three rods of negligible mass to an axis of rotation perpendicular to the plane of the particles as shown in the figure-1. (a) What is the moment of inertia of the system of three particles?

(b) If the massless rods are replaced by three rods of equal masses of 65 gm keeping

their lengths unchanged, what is the moment of inertia of the system now?

(c) If the systems rotate at 4.75 rev/s, what are the systems rotational kinetic

energies?

Acar travels 40m in 8 seconds find the car speed

The unit of resistivity is the: ohm ohm-cm volt coulomb

Now that we have a feel for the state of the circuit in its steady state, let us obtain the expression for the current in the circuit as a function of time. note that we can use the loop rule (going around counterclockwise): e−vr−vl=0. note as well that vr=ir and vl=ldidt. using these equations, we can get, after some rearranging of the variables and making the subsitution x=er−i, dxx=−rldt. integrating both sides of this equation yields x=x0e−rt/l. use this last expression to obtain an expression for i(t). remember that x=er−i and that i0=i(0)=0. express your answer in terms of e, r, and l. you may or may not need all these variables. use the notation exp(x) for ex.