Which element has the atomic number 9?
A) F
B) Ne
C) B
D) Na
E) Be
Answer: A
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Why are molecular lines more complex than elemental spectral lines?
A) Molecules have two or more atoms. B) Molecules can vibrate and rotate as well. C) Molecules are heavier than atoms. D) Molecules are the basis of life. E) Most of the universe is made of molecules, not individual atoms.
Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero?
What will be an ideal response?
The concept that the direction of observation does NOT matter overall is
A) universality. B) homogeneity. C) geometry. D) isotropy. E) relativity.
A car travels around an unbanked highway curve (radius 0.15 km) at a constant speed of 25 m/s. What is the magnitude of the resultant force acting on the driver, who weighs 0.80 kN?
a. 0.87 kN b. 0.34 kN c. 0.80 kN d. 0.00 kN e. 0.67 kN