How fast (in m/s) is the Concorde moving if it reaches Mach 1.5? (The speed of sound in air is 344 m/s.)
a. 229
b. 516
c. 416
d. 728
e. 858
b
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In dielectric materials the polarization is small, _________, and reversible.
Fill in the blank(s) with the appropriate word(s).
The Moon is gravitationally attracted to Earth. Is Earth gravitationally attracted to the Moon?
A. No, the Moon has no gravity. B. Yes, but the force of attraction is less. C. Yes, and the force of attraction is the same. D. Yes, but the force of attraction is greater.
The Earth rotates 360 degrees on its axis
twice a day such that the Sub rises in the West and sets in the East. once a day such that the Sun rises in the East and sets in the West. twice a day such that the Sun rises in the East and sets in the West. once a day such that the Sun rises in the West and sets in the East.
A rod (length = 2.0 m) is uniformly charged and has a total charge of 40 nC. What is the magnitude of the electric field at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
a. 40 N/C b. 45 N/C c. 24 N/C d. 90 N/C e. 36 N/C