Which of the following is not expected to provide solid-solution strengthening?
(a) A large substitutional atom in the tensile strain region of an edge dislocation.
(b) A small substitutional atom in the compressive strain region of an edge dislocation.
(c) A small interstitial atom in the compressive strain region of an edge dislocation.
(d) A small interstitial atom in the tensile region of an edge dislocation.
(c) A small interstitial atom in the compressive strain region of an edge dislocation.
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Compound Microscope: You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a compound microscope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A. Mb = 2 Ma B. Mb = 4 Ma C. Mb = 8 Ma D. Mb = Ma/4 E. Mb = Ma/2
A compound is a stable chemical substance composed of two or more ________.
Fill in the blank(s) with the appropriate word(s).
How will you feel in your spacecraft?
A) You will be floating weightlessly. B) You will feel weight, but less than on Earth. C) You will feel weight, but more than on Earth. D) You will feel the same weight as you do on Earth. E) You will feel yourself pressed against the back of your spaceship with great force, making it difficult to move.
A 60.0-kg satellite is in orbit a distance 2000 km above the surface of the earth. The mass of the earth is 5.976 x 1024 kg and the radius of the earth is 6.378 × 106 m
(a) What is the change in the gravitational potential energy if the satellite moves to a circular orbit 5000 km above the surface of the earth? (b) What is the change in kinetic energy if the satellite moves to a circular orbit 5000 km above the surface of the earth? (c) How much work must be done on the satellite to move it to a circular orbit 5000 km above the surface of the earth?