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A loudspeaker in a parked car is producing sound whose frequency is 20930 Hz. A healthy young person with normal hearing is standing nearby on the sidewalk but cannot hear the sound because the frequency is too high. When the car is moving away from the person, the person can hear the sound. If the speed of sound is 343 m/s, what is the minimum speed of the moving car?
What is the highest speed with which an 1180-kg car can round a turn of radius 75.00 m on a flat road if the coefficient of static friction between tires and road is 0.80.
As a spaceship flies past with speed , you observe that 1.0000 s elapses on the ship's clock in the same time that 1.0000 min elapses on Earth. How fast is the ship traveling, relative to the Earth
A lamp (R=150), an electric heater (R=23), and a fan (R=50) are connected in parallel across a123V line. calculate the power is expended in the heater
Two toy cars resting on a frictionless table top are separated by a spring compressed by tying it with a thread. wht is the mass of the car moving to the left
Two lenses that are L = 42 cm apart are used to form an image, as shown in figure. Find the distance from lens and magnification of the image.
a ball moving with speed v collides with a horizontal smooth surface at an angle ? with normal to surface. if
A 75kg passenger on a roller coaster travels through the bottom of a curve with a radius of 10m at a speed of 15 m/s. what is the apparent weight of the passenger at the bottom of the curve
Suppose the tension in a cord is 14.0 N. If the speed of a wave in the cord is 8.50 m/s, then what must be the linear mass density of the cord
A block is sliding along a frictionless roller coaster. It starts at height h above the ground with some unknown initial speed vo. evaluate the compression of the spring
Two upward wave pulses are generated at opposite ends of a string and travel toward each other. find the maximum displacement of any particle of the string
A slit of width 0.24mm is illuminated with monochromatic light of wavelength 550nm , and a diffraction pattern is formed on a screen 1.4m from the slit. What is the width of the central maximum
A child is playing by jumping on a bathroom scale. The mass of the child is 31 kg and when he stands on a bathroom scale, the spring inside the scale compresses 0.46 mm. what is the maximum height the child can jump on the scale
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