______________ are cool, with temperatures of about 100 K and densities of ten to a few hundreds of atoms per cubic centimeter
Fill in the blank(s) with correct word
H I clouds
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Two slits are illuminated with red light (? = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central maximum?
A. 0.94 B. 0.92 C. 0.96 D. 0.98 E. 0.99
Explain how the Zeeman effect allows us to study stellar magnetic fields
What will be an ideal response?
An engineer uses a river 
to cool his electrical plant which heats water with a boiler operating at 
What’s the maximal performance (in terms of efficiency) theoretically possible for this electrical plant?
A. 64% B. 36% C. 27% D. 73%
Carbon dioxide is largely responsible for the greenhouse effect of the atmosphere.
Answer the following statement(s) true (T) or false (F)