A sphere is dropped from a great height and when its speed reaches 20 m/s, its acceleration downward is 8.4 m/s2 . If the drag force is proportional to the square of the speed, what will be its acceleration downward when its speed reached 40 m/s?
a. 2.6 m/s2
b. 4.2 m/s2
c. 8.0 m/s2
d. 0 m/s2 because it has now reached terminal velocity.
B
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a. ?5.3 cm b. 5.7 cm c. 4.9 cm d. ?6.0 cm e. +6.0 cm
____________________ appear reddish in color due to the light emitted by the Balmer series of the hydrogen atom
Fill in the blank(s) with correct word
The Maxwellian speed distribution provides a direct explanation of:
A. thermal expansion B. the ideal gas law C. heat D. evaporation E. boiling
Which is the correct order of the planets, moving from closest to the Sun to farthest from the Sun?
a. Mercury, Venus, Earth, Saturn, Mars, Jupiter, Neptune, Uranus b. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune c. Venus, Mercury, Mars, Earth, Saturn, Jupiter, Neptune, Uranus d. Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune e. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus