Which of the following aluminum alloys is strain hardened and stabilized to full hardness?
(a) 5052-H38
(b) 2024-T62
(c) 3003-H18
(d) 2090-T86
(a) 5052-H38
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The oxygen in Earth's atmosphere
a. was manufactured inside stars. b. was added to the atmosphere by plant life. c. has grown more abundant since the origin of Earth. d. all of these e. none of these
Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. A light ray that reflects from mirror 1 at angle ?M1 then strikes the second mirror and reflects at ?M2 such that the angle between the ray reaching mirror 1 and the ray leaving mirror 2 is 180°. The angle between the two mirrors is
a. 0°. b. 45°. c. 90°. d. 150°. e. 235°.
A satellite follows an elliptical orbit about a planet as shown. The speed of the satellite is greatest when the satellite is in position
1) A. 2) B. 3) C. 4) D. 5) same at all points in its orbit. At which position is there no component of force in the direction of the satellite's instantaneous velocity? 6) A 7) B 8) C 9) D 10) A component of force exists in the direction of instantaneous velocity at every point along the orbital path.
What is the limiting angle of resolution for the eye if the pupil diameter of the eye is 4.0 mm, a wavelength of light of 600 nm and index of refraction for the eye equal to 1.34?
A) 4.2 × 10-4 rad B) 2.1 × 10-4 rad C) 1.4 × 10-4 rad D) 1.1 × 10-4 rad E) 2.6 × 10-4 rad