The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s acceleration is negative in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions
d
Physics & Space Science
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A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. The hill is 10 m high and 100 m long. If the force of friction as she rides down the hill is 20 N, what is her speed at the bottom?
a. 11 m/s b. 17 m/s c. 24 m/s d. 27 m/s
Physics & Space Science
When an atom emits light, an electron in it moves from a higher to a lower energy level.
Answer the following statement true (T) or false (F)
Physics & Space Science
64,200,000,000 is equal to
a. 6.42 × 10^7. b. 6.42 × 10^?7. c. 6.42 × 10^10. d. 6.42 × 10^?10. e. 1.0 × 10^64.2.
Physics & Space Science
When a neutral atom loses an electron, we say that it becomes
A) vaporized. B) dissociate. C) ionized. D) an isotope. E) a plasma.
Physics & Space Science