Standard time zones
a)contain 30° of latitude.
b)contain 15° of longitude.
c)are 12 in total number.
d)are 7.5° wide.
b
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A fluid is flowing with an average speed of 1.50 m/s through a tube that has a radius of 2.00 mm and is 18 cm long. The drop in pressure is 967 Pa. What is the viscosity of the fluid?
A) 0.00179 Ns/m2 B) 0.00562 Ns/m2 C) 0.0278 Ns/m2 D) 0.0134 Ns/m2 E) 0.00335 Ns/m2
Rank the following 4 items by how long it takes for light to reach us from these objects, from shortest to longest
A) Pluto, Sun, the Andromeda Galaxy, center of the Milky Way B) Sun, Pluto, center of the Milky Way, the Andromeda Galaxy C) the Andromeda Galaxy, the center of the Milky Way, Pluto, Sun D) Pluto, Sun, center of Milky Way, the Andromeda Galaxy E) Sun, Pluto, the Andromeda Galaxy, center of the Milky Way
Supergiant stars are burning different fuels in several shells around the core
Indicate whether the statement is true or false
Object A is more massive than object B. Which of the following statements is true?
A. Both object A and object B experience the same gravitational force. B. Both object A and object B experience the same gravitational acceleration. C. Object A experiences a greater gravitational force and gravitational acceleration than object B.