All of the following may be represented by vectors except:
a. velocity
b. speed
c. acceleration
d. displacement.
Ans: b. speed
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Kirchhoff was the first to describe qualitatively the types of spectra we observe from luminous objects. Describe the three types and their sources
What will be an ideal response?
In the gas laws, the ______________ temperature scale must be used
Fill in the blank(s) with correct word
The meter is currently defined as
A) the distance between two etched lines in a platinum-iridium bar kept in S vres, France. B) the distance between two etched lines in a platinum-iridium bar kept in Washington, D.C. C) one ten-millionth of the distance between the North pole and the equator. D) the distance traveled by light in 1/299,792,458 of a second. E) 1,553,164.1 wavelengths of red cadmium light in dry air at 25°C.
Each of two long straight parallel wires separated by a distance of 16 cm carries a current of 20 A in the same direction. What is the magnitude of the resulting magnetic field at a point that is 10 cm from each wire?
A. 57 ?T B. 80 ?T C. 64 ?T D. 48 ?T E. 40 ?T