Which of these strongly relate to a piano string?
A) mass
B) length
C) pitch
D) all of the above
E) none of the above
Answer: D
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The main lens or mirror of a telescope is called the ____________________
Fill in the blank(s) with correct word
Light of intensity I0 and polarized horizontally passes through three polarizes
The first and third polarizing axes are horizontal, but the second one is oriented 20.0° to the horizontal. In terms of I0, what is the intensity of the light that passes through the set of polarizers? A) 0.442I0 B) 0.883I0 C) 0.780I0 D) 0.180I0
What is the fundamental reason that Mars, unlike Earth, has become virtually geologically dead?
A) its small size compared to Earth B) its large size compared to Earth C) its farther distance than Earth to the Sun D) its closer distance than Earth to the Sun E) its rapid rotation compared to Earth F) its slow rotation compared to Earth
An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 500-m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00