The pair of terms wave speed and wave frequency are
A. opposites.
B. reciprocals.
C. basically the same.
D. fundamentally different from each other.
Answer: D
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Draw a sketch to show where eddies can form when air blows rapidly over a mountain range. Indicate where clouds might form. How would these clouds appear when viewed from the ground?
What will be an ideal response?
Which has stronger attractions among its submicroscopic particles: a solid at 25°C or a gas at 25°C?
A) The attractions among the submicroscopic particles of the solid must be stronger than the attractions among the particles of the gas. B) The submicroscopic particles of the gas are moving faster. This means that they have more energy, which means that the attractions among them must be stronger. C) The attractions among the submicroscopic particles of the solid are much stronger—so much stronger that they hold the particles of the solid absolutely still. D) The temperatures of these two materials are the same, which means that the attractions among their submicroscopic particles are also of the same strength.
How can a hydrogen atom, which has only one electron, have so many spectral lines?
A) The electron is able to move at various speeds. B) The protons in the nucleus are also giving off various light frequencies. C) One electron can be boosted to many different energy levels. D) The atomic radius of the hydrogen atom is relatively large.
What is the difference between rill and sheet erosion? What will be an ideal response?