Two one-liter containers each contain 10 moles of a gas. The temperature is the same in both containers. Container A holds helium (molecular mass = 4 u), and Container B holds oxygen (molecular mass = 32 u). Which container has the higher pressure and by what factor?
a. Container A has 4 times the pressure of Container B.
b. Container A has 8 times the pressure of Container B.
c. Both containers have the same pressure.
d. More information is needed to answer this question.
C
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A particle is moving with a constant acceleration of 4.0 m/s2 . Its speed at t = 1.0 s is 4.0 m/s and at t = 3.0 s it is 12.0 m/s. What is the area under the position-time graph for the interval from t = 1.0 s to t = 3.0 s?
a. 8.0 m/s b. 8.0 m c. 12 m d. 16 m e. 16 m/s2
For a particular process where a fluid is being heated in a 2 inch (5.08 cm) diameter tube, the Nusselt number is predicted to be 45. If the fluid has a thermal conductivity of 1.5 Btu/hr·ft·ºF (2.6 W/mK) what is the predicted convective heat transfer coefficient?
What will be an ideal response?
Where do stars form in the galaxy today?
A.) No stars are forming in the galaxy today. B.) In the halo. C.) In the disk. D.) Only around the Sun. E.) B and C.
An atomic nucleus has a charge of +40e. An electron is 10-9 m from the nucleus. What is the force on the electron?
A) 2.9 nN B) 1000 C C) 3.7 nN D) 6.8 nN E) 9.2 nN