The area under the force-displacement curve represents:
a. area. b. work.
c. force.
d. coefficient of static friction.
B
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Which of these is NOT considered a fine example of galactic collisions?
A) the Cartwheel Galaxy B) the Antennae Galaxies C) the Whirlpool Galaxy D) M-31 in Andromeda E) M-87 in Virgo
What is the stored energy in a 1.5-mH coil carrying a current of 4.0 A?
a. 12 × 10^-3 J c. 8.0 × 10^-3 J b. 4.0 × 10^-3 J d. 2.0 × 10^-3 J
The sweep technique used in SETI programs is also known as a
A) targeted search B) intentional search C) sky survey D) random search
A point charge (?5.0 ?C) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 ?C) is placed on the x axis at x = ?4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 ?C) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N