Starting from rest, a car travels 1 350 meters in 1.00 minute. It accelerated at 1.0 m/s2 until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?
30 m/s
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Which one of the choices below represents the preferred practice regarding significant figures when adding the following: 15.9 + 14 + 77.68 + 6.898?
a. 114.4780 b. 114.478 c. 114.48 d. 114.5 e. 114
A star on the red giant branch has a core about the size of ________
Fill in the blank(s) with correct word
A 3.42-kg stone hanging vertically from an ideal spring on the earth undergoes simple harmonic motion at a place where g = 9.80 m/s2. If the force constant (spring constant) of the spring is find the period of oscillation of this setup on a planet where g = 1.60 m/s2.
A) 5.70 s B) 3.35 s C) 2.51 s D) 4.36 s
Making a laser work depends on creating a population inversion, meaning a situation in which:
a. most electrons are in the lower energy state. b. most photons are in the lower energy state. c. more electrons are in a high-energy than a low-energy state. d. the directions of electron motion are reversed, or inverted. e. more photons are in a high-energy than a low-energy state.