Consider the diagram shown at right, which has a 15 V battery connected to two resistors valued at R1 = 30. Ω and R2 = 20. Ω and an ammeter. Calculate:
a the equivalent resistance
b. the power dissipated across R2
c. the reading made by the ammeter

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Heterogeneous mixture with larger particles that never settle is