The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds

Fill in the blank(s) with correct word


disk

Physics & Space Science

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The planet(s) of our solar system that are usually or never visible to the naked eye are

a. Mars. b. Mercury and Neptune. c. Saturn, Uranus, and Neptune. d. Uranus and Neptune. e. Mercury and Venus.

Physics & Space Science

A thin-walled cylindrical tank, under internal pressure p, is com-pressed by a force F 5 75 kN. Cylinder diameter is d 5 90 mm and wall thickness t 5 5.5 mm. Allowable normal stress is 110 MPa and allowable shear stress is 60 MPa. The maximum allowable internal pressure pmax is approximately:


(A) 5 MPa
(B) 10 MPa
(C) 13 MPa
(D) 17 MPa

Physics & Space Science

Alpha particles are normally repelled by atomic nuclei because

A) their closeness with atomic nuclei violates quantum rules. B) of oppositely-directed forces. C) they both have the same sign of electric charge. D) all of the above E) none of the above

Physics & Space Science

What is the potential difference across C2 when C1 = 5.0 ?F, C2 = 15 ?F, C3 = 30 ?F, and V0 = 24 V?



a.
21 V

b.
19 V

c.
16 V

d.
24 V

e.
8.0 V

Physics & Space Science