In the context of a star's spectrum, which of the following statements is true of a giant star?
A) Hydrogen atoms in its atmosphere do not often collide with each other.
B) Its atmosphere is very dense.
C) Its spectrum has very broad spectral lines.
D) Energy levels are not distorted when atoms in its atmosphere collide.
A
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Answer the following statement true (T) or false (F)
A 100-kg person sits on a 5-kg bicycle. The force that the person exerts on the bicycle is borne equally by the two wheels of the bicycle. The tires are 2.0 cm wide and are inflated to a gauge pressure of 8.0 × 105 Pa
What length of each tire is in contact with the ground? A) 1.6 cm B) 1.8 cm C) 3.2 cm D) 2.4 cm E) 6.4 cm
The main difference between a radio wave and a sound wave is
A) frequency. B) wavelength. C) energy. D) amplitude. E) basic nature.
What is the gravitational force between two 7.00-kg balls, when they are 35.0 cm apart? G = 6.67 x 10-11 N•m2/kg2
What will be an ideal response?