Which of the following four objects has different kinetic energy?
a. An object of mass m moving with speed 4v
b. An object of mass 4m moving with speed 2v
c. An object of mass 16m moving with speed v
d. An object of mass 2m moving with speed 3v
e. None of these; all four objects have the same kinetic energy.
d
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In ultrasound the __________ of the sound is much greater than in normal sound
Fill in the blank(s) with correct word
The wavelengths of the sounds produced by two horns are 6.0 m and 7.0 m, respectively. What beat frequency is heard when the horns are sounded on a day when the speed of sound is 340 m/s?
A) 5 Hz B) 6 Hz C) 7 Hz D) 8 Hz
What is the angular separation of two spectral lines of wavelengths 497 nm and 251 nm formed in the third order with a diffracting grating having 587 lines per millimeter?
A) 34.8° B) 24.8° C) 41.3° D) 29.4° E) 4.21°
If the height of water behind a dam is increased by a factor of two, then the maximum kinetic energy of the water at the bottom of the dam will increase by a factor of _____
a. one b. two c. four d. zero