The current in resistor 6 is = 1.42 A and the resistances are R1 = R2 = R3 = 1.71 Ohms, R4 - 17.5 Ohms, R5 - 8.26 Ohms, and R6 = 3.58 Ohms. What is the emf of the ideal battery? R1,R2,R5 are in series, R3,R4,R6 are in parallel​

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount