What is the specific volume of R-134a at 20°C and 730 kPa? What is the internal energy at that state? Use data from the steam tables.

Specific volume = 8.16 × 10⁻⁴ m³/kg

Internal energy = 78.85 KJ/kg

Explanation:

At the conditions provided, refrigerant-134a (1,1,2,2 - Tetrafluoroethane) is a very compressed liquid. We know this because its boiling point is -26.3°C (So, at 20°C, it's a liquid) and at 730 KPa, this very high pressure will definitely compress it.

In the steam tables, there are no outright readings for super compressed liquids, but the behaviour of a saturated liquid at those stated conditions approximates what we want. So, checking under saturated liquid, the specific volume was obtained to be 0.000816 m³/kg and the internal energy, 78.85 KJ/kg.

show the wavelengths of a wave. show the crests of a wave.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles