At what local solar time will the first-quarter moon be on an observer's overhead meridian?
6:00 P.M.
Physics & Space Science
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As a supersonic aircraft increases in speed, the angle of its V-shaped shock wave becomes
A) wider. B) narrower. C) both of these D) neither of these
Physics & Space Science
A wave travels an average distance of 6 m in 1 s. What is the wave's average velocity?
A) less than 0.2 m/s B) 1 m/s C) 3 m/s D) 6 m/s E) more than 6 m/s
Physics & Space Science
A brick weighs 50.0 N, and measures 30.0 cm × 10.0 cm × 4.00 cm. What is the maximum pressure it can exert on a horizontal surface due to its weight?
A) 1.25 Pa B) 12.5 Pa C) 1.25 kPa D) 12.5 kPa
Physics & Space Science
An echo is a sound wave that has been
a. diffracted b. refracted c. reflected d. reverberated e. amplified
Physics & Space Science