Which of the following is an example of a longitudinal wave?
a. sound wave in air
c. both a and b
b. wave traveling in a string
d. neither a nor b
A
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Venus has a higher uncompressed density than Earth
Indicate whether the statement is true or false
Besides Earth, which of the terrestrial planets and/or satellites of terrestrial planets show(s) evidence for the possible existence of liquid water flowing on its surface in the past?
a. Venus b. The Moon c. Phobos d. Mars e. None of the terrestrial planets or satellites show such evidence.
The rotation spectrum of the HCl molecule suggests a photon in the far infrared (around 5.0 × 10^?6 m) can excite the first rotational level. From this data, the moment of inertia of the HCl molecule (in kg ? m2) is
a. 2.8 × 10^?48 b. 2.8 × 10^?49 c. 2.8 × 10^?47 d. 2.8 × 10^?46 e. 2.8 × 10^?45
The most common form of lightning strike from a cloud to the ground involves negative charge moving from the cloud to the ground. Just before a lightning strike,
A. the electric field must point toward the sky. B. the potential must be larger near the cloud. C. there are no charges on the ground. D. the potential energy of the electrons in the cloud must be small.