A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the total energy of the system is
a. 2.0 × 10^4 J.
b. 2.5 × 10^4 J.
c. 1.7 × 10^3 J.
d. 1.5 × 10^3 J.
e. 4.0 × 10^4 J.
a
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A square and a circular loop with the same area lie in the xy-plane, where there is a uniform magnetic field pointing at some angle q with respect to the positive z-direction. Each loop carries the same current, in the same direction. Which magnetic torque is larger?
1.the torque on the square loop 2.the torque on the circular loop 3.the torques are the same 4.more information is needed
What is not part of the radial velocity method?
A: A star moving a little towards and a little away from us B: A planet passing in front of its host star C: A star making a small orbit because of the planet's influence D: A detected redshift from a star E: A detected blueshift from a star
For which of the graphs was the result most curved, and closest to the one we are familiar with for the planet orbits about the Sun?
A.) 0%. B.) 25%. C.) 50%. D.) 75%. E.) 100%.
Which of the following correctly lists the layers of Earth's atmosphere from the ground upward?
A) troposphere, stratosphere, thermosphere, exosphere B) thermosphere, stratosphere, troposphere, exosphere C) exosphere, stratosphere, thermosphere, troposphere D) troposphere, thermosphere, stratosphere, exosphere