Compared to a cold molecular cloud at 10 K, an HII region has a temperature about
A. 1,000 times hotter.
B. 10 times hotter.
C. 1,000,000 times hotter.
D. the same.
Answer: A
You might also like to view...
Adam's toy gun emits blue light, Sue's emits red light, Bonnie's emits infrared light, and James's emits ultraviolet light. Which gun produces the most energetic light?
A. Bonnie B. Sue C. James D. Adam E. All of the toy guns have the same energy.
In an energy diagram, what does the difference between the energy line and the potential energy line represent?
A. Change of thermal energy B. Energy leaving the system C. All of these are correct. D. Kinetic energy
If elements A and B chemically bond to each other more strongly than a random mixture of A and B elements chemically bond, it is expected that a _____________ of A and B should form.
Fill in the blank(s) with the appropriate word(s).
Torque: In the figure, the rectangular loop is pivoted about one side (of length 0.060 m), that coincides with the y-axis. The end (length 0.020 m) of the loop that lies in the xz-plane makes an angle of 37° with the x-axis as shown. The loop carries a current of I = 69 A in the direction shown. (In the side of the loop that is along the y-axis the current is in the +y direction.) If there is a uniform magnetic field of magnitude 9.7 T in the -x direction, find the magnitude of the torque that this magnetic field exerts on the loop.
Fill in the blank(s) with the appropriate word(s).