A 4.0-cm tall object is placed along the principal axis of a thin, convex lens of 30.0-cm focal length. If the object distance is 40.0 cm, which of the following best describes the image distance and height, respectively?
a. 17.3 cm and 7.0 cm
c. 120 cm and 1.3 cm
b. 17.3 cm and 1.3 cm
d. 120 cm and 12 cm
D
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Slanting Surfaces Without Friction: A 150-N crate is being pulled up a perfectly smooth ramp that slopes upward at 15° by a pull that is directed at 30° above the surface of the ramp. What is the magnitude of the pull required to make the crate move up the ramp at a constant velocity of 1.75 m/s?
Fill in the blank(s) with the appropriate word(s).
If the angular diameter of an object is 15 arc seconds and it is 1.4 billion kilometers away, how big is its physical size? Show how you arrived at your answer
What will be an ideal response?
For a point on a spinning disc in uniform circular motion, which of the following is not constant?
a. Its angular speed. b. Its angular acceleration. c. Its centripetal acceleration. d. The magnitude of its total acceleration.
Parallel-Plate Capacitor: A 3.0-pFcapacitor consists of two large closely-spaced parallel plates that have surface charge densities of ±1.0 nC/mm2. If the potential across the plates is 23.0 kV with only air between them, find the surface area of each of the plates. (?0 = 8.85 × 10-12 C2/N ? m2)
A. 69 mm2 B. 0.014 mm2 C. 35 mm2 D. 0.0072 mm2