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A car is traveling away from you at 40.0 mi/h. The car horn produces a sound at a frequency of 480 Hz. What frequency do you hear? Assume that the sound velocity in air is 1090 ft/s.
A circular hole in an aluminum plate is 3.263 cm in diameter at 0.000°C. What is its diameter (in cm) as the temperature of the plate is raised to 129.8°C? Give the answer to four significant figures. The linear expansion coefficient of aluminum i..
Two converging lenses, each of focal length 13.1 cm, are placed 58.6 cm apart, and an object is placed 29.9 cm in front of the first. What is the magnification of the system
an RLC series circuit consists of a 24 V (rms) 0.50 Hz AC power supply, a 25 ohm resister, a 10 H inductor, and a 0.050 F capacitor, what is the rms current through the inductor
A car travels due east with a speed of 32.0 km/h, The traces of the rain on the side windows of the car make an angle of 52.0° with the vertical, Find the velocity of the rain
What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}.
An air bubble has a volume of 1.65 cm3 when it is released by a submarine 115 m below the surface of a lake. What is the volume of the bubble
A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.
To test the deflection of the uniform 200-lb beam the 121-lb boy exerts a pull of 36 lb on the rope rigged. Calculate the force supported by the pin at the hinge O.
A 1128 kg car and a 2210 kg pickup truck approach a curve on the expressway that has a radius of 272 m. A) At what angle should the highway engineer bank this curve so that vehicles traveling at 72.9 can safely round it regardless of the condition..
A bat emits short pulses of sound at a frequency of 1.60×105 Hz. As the bat swoops toward a flat wall at speed 30.0 m/s, What is the frequency of sound incident on the wall
A parallel-plate capacitor in air has a plate separation of 1.49 cm and a plate area of 25.0 cm2. Determine the change in energy of the capacitor
You are driving along a highway at 25.5 m/s when you hear a siren. You look in the rear-view mirror and see a police car approaching you from behind with a constant speed, How fast was the police car moving
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