You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45°
b. 23.4°
c. 39°
d. 51°
e. The answer depends on the day of the year.
c
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By what factor does the kinetic energy of a car change when its speed is tripled?
a) no change at all b) factor of 3 c) factor of 6 d) factor of 9 e) factor of 12
Minimal orbit speed about Earth is about 8 km/s, and about Jupiter is
A) less than 8 km/s. B) more than 8 km/s. C) about 8 km/s.
When the distance between two charges is halved, the electric force between the charges
A) quadruples. B) doubles. C) is half. D) is reduced by one-quarter. E) none of the above
Opposite of the emission-line spectrum, because an atom's set of possible absorption lines have exactly the same wavelengths as its possible emission lines.
A. absorption line spectrum B. emission line spectrum C. continuous spectrum