Which of the following terms is given to a pair of stars that appear to change position in the sky, indicating that they are orbiting one another?
A) spectroscopic binary
B) double star
C) eclipsing binary
D) visual binary
E) none of the above
D
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The solar wind extends to the _______________, marking an outer boundary of the Solar System
Fill in the blank(s) with correct word
Two thin cables, each having a diameter of d 5 t/6 and carrying tensile loads P, are bolted to the top of a rectangular steel block with cross-sectional dimensions b 3 t. The ratio of the maximum tensile to compressive stress in the block due to loads P is:
(A) 1.5
(B) 1.8
(C) 2.0
(D) 2.5
The figure shows two wires that are tied to a 710 g mass that revolves in a horizontal circle at a constant speed of 7.5 m/s. What is the tension in the upper wire?
A) 34 N B) 20 N C) 27 N D) 41 N
A ray of light is incident on the mid-point of a glass prism surface at an angle of 24.0° with the normal. For the glass, n = 1.55, and the prism apex angle is 44.3°. What is the angle of refraction as the ray enters the air on the far side of the prism?
a. 0.853° b. 48.9° c. 18.3° d. 11.7° e. 29.1°