An astronomical telescope has a barrel length of 33 cm and an angular magnification of 10. What are the focal lengths of the objective and the eyepiece in that order?
A. 0.3 m, 3 m
B. 30 cm, 3 cm
C. 20 cm, 13 cm
D. 3 cm, 30 cm
B. 30 cm, 3 cm
Physics & Space Science
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A double convex (convex-convex) thin lens has radii of curvature 46. cm, and is made of glass of index of refraction n = 1.60. What is the focal length?
A) 36. cm B) infinite C) 46. cm D) 18. cm E) 38 cm
Physics & Space Science
What is the hardness of diamond on the Mohs scale?
a. 1 b. 4 c. 7 d. 10
Physics & Space Science
What is Kirchoff’s law?
What will be an ideal response?
Physics & Space Science
A 50-kg child riding a Ferris wheel (radius = 10 m) travels in a vertical circle. The wheel completes one revolution every 10 s. What is the magnitude of the force on the child by the seat at the highest point on the circular path?
a. 0.29 kN b. 0.49 kN c. 0.69 kN d. 0.20 kN e. 0.40 kN
Physics & Space Science