Physics questions - 20 points
an ideal gas expands in an adiabatic process that increases its volume by a factor of 3.5. the initial pressure is 6.4 × 10^5 pa. what is the final pressure? let γ = 1.57.
answers:
9.0*10^4 pa
1.1*10^5 pa
1.2*10^4 pa
6.4*10^4 pa
8.9*10^5 pa

The two required components for a generator

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?