Suppose that you measure the parallax angle for a particular star to be 0.1 arcseconds. What is the distance to this star? (Hint: A star at a distance of 3.26 light-years has a parallax angle of 1.0 arcseconds.)
A) 0.1 light-years
B) 0.326 light-years
C) 10 light-years
D) 32.6 light-years
E) 3.26 light-years
D) 32.6 light-years
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A disk (radius = 8.0 cm) that rotates about a fixed axis starts from rest and accelerates at a constant rate to an angular velocity of 4.0 rad/s in 2.0 s. What is the magnitude of the total linear acceleration of a point on the rim of the disk at the instant when the angular velocity of the disk is 1.5 rad/s?
a. 24 cm/s2 b. 16 cm/s2 c. 18 cm/s2 d. 34 cm/s2 e. 44 cm/s2
An eclipse season is the period of time during which the
a. moon crosses a node in its orbit. b. sun crosses a node in the moon's orbit. c. line of nodes crosses the moon's orbit. d. the moon is new or full. e. the moon is visible during the day.
Which statement about Pluto is not true?
A) Its surface temperature is very cold. B) It is made mostly of rock and ice. C) It is both smaller and less massive than Earth. D) It is the most massive object in the Kuiper belt. E) It was visited by the New Horizons spacecraft in 2015.
A(n) ______ layout presents multiple topics, each in its own square or rectangle.
A. card B. geometric C. grid D. gallery