A book is sitting on a desk top. Identify the 3rd law partner of the weight of the book.
A. the force of the desk on the book
B. the force of the book on the desk
C. the force of the earth on the book
D. the force of the book on the Earth
D. the force of the book on the Earth
(Weight is due to Earth on book, so 3rd law pair must be book on Earth.)
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Stellar parallax occurs in much the same way as parallax on Earth, with greater parallax for stars that are nearer. Return to the main "Parallax" screen, and from here select the "Stellar Parallax" button, and watch how the motion of the star changes in the "View from Earth" window. Which statement best summarizes why stellar parallax occurs?
A. We view nearby stars from different positions in Earth's orbit at different times of year. B. We view nearby stars from different positions on Earth as Earth rotates on its axis. C. Nearby stars move in tiny circles as Earth orbits the Sun. D. Nearby stars move at higher speeds relative to the Sun than more distant stars.
Consider a beam of free particles with a certain speed . If we double this speed, what happens to the beam’s de Broglie wavelength?
A. It increases by a factor of 2. B. It increases by a factor of 21/2. C. It remains the same. D. It decreases by a factor of 21/2. E. It decreases by a factor of 2.
The lattice parameter of nickel is 0.352 nm, and for copper it is 0.363 nm. The electronegativities are 1.8 and 1.9, respectively, and they are both FCC metals. It is expected that there is _____________solid solubility of nickel in solid copper at elevated temperature.
Fill in the blank(s) with the appropriate word(s).
A steel rod 55 cm long has a diameter of 30 cm. The compressive strength (the maximum stress it can support without breaking) of this steel is 500 × 106 N/m2. What is the compression force that would break the rod?
A) 3.5 × 107 N B) 2.4 × 107 N C) 1.4 × 108 N D) 4.7 × 108 N E) 8.9 × 108 N