How large are granules, and how long do they last?
What will be an ideal response?
These Texas-sized (1,000 km on average convective cells dissipate in about ten minutes after erupting in the photosphere.
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Dislocations always _____________the energy of a crystal.
Fill in the blank(s) with the appropriate word(s).
The formula mass of water, H2O, is
a. 18 u. b. 9 u. c. 10 u. d. 17 u.
What is the mean free path of a gas of hard spheres of radius 2.00 × 10-9 m when the number of spheres per volume is 3.00 × 1019 m-3?
A) 1.17 × 10-4 m B) 4.00 × 10-9 m C) 9.76 × 10-5 m D) 1.88 × 10-3 m E) 4.69 × 10-4 m
A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 950 N/m. The maximum compression of the spring is 2.10 cm. What is the speed of the bullet just before it hits the block?
A) 690 m/s B) 700 m/s C) 672 m/s D) 900 m/s E) 952 m/s