The kinetic friction force that a horizontal surface exerts on a 60.0-kg object is 50.0 N. If the initial speed of the object is 25.0 m/s, what distance will it slide before coming to a stop?
A) 15.0 m
B) 30.0 m
C) 375 m
D) 750 m
C
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The weight of a body on the Moon is _______________ the weight of the same body on Earth
Fill in the blank(s) with correct word
The frequency separating audible waves and ultrasonic waves is considered to be 15.0 kHz. What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 225 m/s.)
a. 1.50 cm b. 33.8 cm c. 22.5 cm d. 33.8 cm e. 33.8 cm
"Sympathetic vibrations" refers to
A) beats. B) interference. C) pitch. D) resonance.
The Himalayan Mountains are rugged, jagged peaks and the Appalachians are smooth and rolling. Why is there a difference?
a. The Himalayas are much older and the rocks have begun breaking off. b. The Himalayas are volcanic mountains and the Appalachians are not. c. The Appalachians are much older and have been smoothed by erosion. d. The Appalachians are younger and just started to be thrust upward by plate tectonics. e. a and d