Vector = 4.0 m points eastward and vector = 3.0 m points westward. The resultant vector + is given by
A) 7.0 m east.
B) 7.0 m west.
C) 1.0 m east.
D) 1.0 m west.
E) 3.5 m west.
C
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You are asked to produce a part that will be shaped by forging from a thick block of metal. Forging is a form of controlled hammering the part into shape that is covered in Section 13.2.1. The final part will have some thin sections that will experience extensive deformation and some thick sections that will experience minimal deformation. It is desired that the mechanical properties of the as forged metal be relatively uniform throughout the part. It is planned to use the part in the as forged condition without subsequent treatment. What defect property of metals may be important in the metal selection, and why is this property important for this design?
What will be an ideal response?
A deuteron is captured by an oxygen-16 atom which in turn emits a proton. What is the element and mass number of the product isotope?
a. oxygen-15 b. fluorine-15 c. nitrogen-15 d. oxygen-17
The Eocene is a(n)
a. epoch. b. era. c. eon. d. period.
Camera #1 has a lens of diameter 2.0 cm with a focal length of 5.0 cm, camera #2 has a lens of diameter 1.5 cm with a focal length of 4.5 cm, and camera #3 has a lens of diameter 1.1 cm with a focal length of 3.3 cm. Assuming all the cameras use the same type film and have a shutter speed of 1/200 s, which camera can give the best exposure at the lowest light level?
1.#3 2.#2 3.#2 and #3 are both equal and better than #1. 4.#1