Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. If these two vectors are added together, the magnitude of the sum
A) is equal to 2.0 m.
B) could be as small as 2.0 m or as large as 12 m.
C) is equal to 12 m.
D) is equal to 8.6 m.
B
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A beam of electrons is sent in the positive x direction in a region with a uniform magnetic field B in the positive y direction and a uniform electric field E in the positive z direction. At which of the following speeds would the electrons be deflected in the positive z direction?
a. v = E/B b. There is no speed for which this will happen. c. v < E/B d. v > E/B
Molecular Speeds: If the temperature of a gas is increased from 20°C to 100°C, by what factor does the rms speed of an ideal molecule change?
A. 1.1 B. 1.3 C. 2.2 D. 1.6
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The linear momentum of the crate is Fv
a. True b. False Indicate whether the statement is true or false
The science of increasing the strength of materials is the science of controlling the structure and _____________in materials.
Fill in the blank(s) with the appropriate word(s).