Which of the following could be associated with a temperature increase for a fixed amount of gas?
1.a decrease in the volume at constant pressure
2.a decrease in the pressure at constant volume
3.a decrease in both the pressure and the volume
4.an increase in the pressure at constant volume
4
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Develop the control volume difference equation for one-dimensional steady conduction in a in with variable cross-sectional area A(x) and perimeter P(x). The heat transfer coefficient from the fin to ambient is a constant oh and the fin tip is adiabatic.
GIVEN
• Fin with variable cross-sectional area and perimeter
• Convection coefficient to ambient is constant, ho
FIND (a) Control volume difference equation
SKETCH
Early astronomers believed that Earth did not move because they saw no ____, the apparent motion of an object because of the motion of the observer
a. uniform circular motion b. archeoastronomy c. heliocentrism d. eccentricity e. parallax
The magnetic field in a cyclotron is 0.50 T. Find the magnitude of the magnetic force on a proton with velocity of 
m/s in a plane perpendicular to the field.
A. 
B. 
C. 
D. 
Briefly summarize the stages of life for a high-mass star
What will be an ideal response?