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A human cannot hear sound at a frequency of 100 kHz or sound at 102 kHz. But if you walk into a room in which two sources are emitting sound waves, one at 100 kHz and the other at 102 kHz, you'll hear sound. Explain.
A 940kg motorboat accelerates away from a dock at 2.1m/s^2 .t Its propeller provides a thrust force of 4.0kN. What drag force is exerted by the water on the boat
A stunt man whose mass is 70kg swings from the end of a 4.50m long rope along the arc of a vertical circle. Assume that he starts from rest when the rope is horizontal, find the tensions in the rope that are required to make him follow his circula..
Image intensifiers used in night-vision devices create a bright image from dim light by letting the light first fall on a photocathode. If light of wavelength 720nm strikes such a photocathode, what will be the maximum kinetic energy, in eV, of the..
the green block b has a mass of 13.40 kg and is moving to the left at a speed of 3.50ms. the red block a has a mass of
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. calculate the final temperature of the puddle
The lowest point in Death Valley is 85 m below sea level. What is the change in potential energy of an energetic 91.2kg hiker who makes it from the floor of Death Valley to the top of Mt. Whitney
one end of a uniform 4.0 m long rod of weight is supported by a cable. the other end rests against a wall where it is
Listen to one (1) of the following podcasts listed below: NPR Podcast: Can healthy eating reverse some cancers? Availablehere. Dana Farber Podcast: Sugar and Cancer. Availablehere.
a section of a sphere has a radius of curvature of 0.95 rm m. if this section is painted with a reflective coating on
A duck has a mass of 2.6 kg. As the duck paddles, a force of 0.11 N acts on it in a direction due east. In addition, the current of the water exerts the force of 0.12 N in a direction of 44° south of east. When these forces begin to act, the velocity..
The answer given was that "the figures for the fall semester are approximately 12 percent for the girls and 15-18 percent for the guys, which produces a ‘Greek' figure of approximately 27-30 percent of the undergraduates." Discuss the campus newsp..
A defibrillator is used to restart a persons heart after it stops beating. Energy is delivered to the heart by discharging a capacitor through the body tissues near the heart. If the capacitance of the defibillator is 9 pF and the energy delivered..
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