When a car passes you with its horn blaring you hear a lower-frequency sound after the car has passed than when it is approaching. This is because:
A. The frequency of the sound wave produced changes
B. Motion of the source changes the wavelength of the sound reaching you
C. The air warms up due to motion of the car, causing the speed of sound to change
B. Motion of the source changes the wavelength of the sound reaching you
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What is the escape velocity from the Moon for a lunar landing module sitting on the Moon's surface? Hints: ; The mass of the Moon is 7.2 × 10^22 kg; its radius is 1738 km; G = 6.67 10^-11 m3/s2/kg
a. 2.3 m/s b. 23 m/s c. 2.3 km/s d. 11 km/s e. 23 km/s
Collisions in Two Dimensions: A 900-kg car traveling east at 15.0 m/s suddenly collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together after the collision. What is the speed of the wreckage just after the collision?
A. 6.10 m/s B. 12.2 m/s C. 25.0 m/s D. 35.0 m/s E. 17.3 m/s
A temperature difference of 9.0 Celsius degrees is equal to a Fahrenheit temperature difference of
A. 5.0 Fahrenheit degrees. B. 9.0 Fahrenheit degrees. C. 16 Fahrenheit degrees. D. 37 Fahrenheit degrees. E. 41 Fahrenheit degrees.
Which of the following is an indication that one is dealing with a wave property instead of a particle property?
a. energy b. quanta c. interference d. momentum