What is the frequency does a stationary observer hear when a train approaches her with a speed of 30 m/s. The frequency of the train horn is 0.600 kHz and the speed of sound is 340 m/s
A) 551 Hz
B) 600 Hz
C) 653 Hz
D) 658 Hz
D
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Newton's Second Law in 1 Dimension: A flatbed truck is carrying an 800-kg load of timber that is not tied down. The maximum friction force between the truck bed and the load is 2400 N. What is the greatest acceleration that the truck can have without losing its load?
Fill in the blank(s) with the appropriate word(s).
Which of the following changes would increase the separation between the bright fringes in the diffraction pattern formed by a diffraction grating?
A) Immerse the apparatus in water. B) Increase the wavelength of the light used. C) Increase the separation between the slits. D) All of these. E) None of these.
Solar eclipses can occur during ________.
A. the waning crescent moon B. the waxing crescent moon C. the new moon D. the full moon E. any phase of the moon
The star Aldebaran is cooler and much more luminous than the Sun. Where do you expect to find Aldebaran in the H-R diagram?
A. bottom left B. top left C. bottom right D. center E. top right