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A car moving at 25m/s approaches a stationary whistle that emits a 350Hz sound. The speed of sound in the air is 343m/s
A) what is the frequency of sound heard by the driver of the car?
B) what is the frequency of sound heard by the driver of the car after passing the whistle and moving away from it?
C) what is the frequency of sound heard by the driver of the car if the whistle is also moving toward the car at 12m/s?
D) what is the frequency of sound heard by the driver of the car if the whistle is now moving in the same direction as the car with a speed of 12m/s?
A wheel initially rotating at an angular speed of 1.4 rad/s turns through 30 revolutions during the time that it is subject to an angular acceleration of 0.40 rad/s2
a person has a near point of 40 cm and a far point of 2.0 m. when looking through lenses of focal length -2.0 m, what is the nearest an object can be to be seen clearly
A horizontal wire of length 0.59 m, carrying a current of 8.1 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force.
Argon is a monatomic gas whose atomic mass is 39.9 u. The temperature of 9 grams of argon is raised by 75 K under conditions of constant pressure. Assuming that argon is an ideal gas, evaluate how much heat is required? J
The main components of a thermal/steam power plant are: Pump, boiler, steam turbine, condenser and generator. which one operates at higher temperature and pressure
An air-filled parallel-plate capacitor has plates of area 2.20 cm2 separated by 0.50 mm. What is the magnitude of the uniform electric field between the plates
A thin, uniform, metal bar, 3m long and weighing80N , is hanging vertically from the ceiling by a frictionless pivot, Find the angular speed of the bar just after the collision
What is the maximum speed of a 2.20g particle that oscillates between x =2.0mm and x =8.0mm, Suppose the collision between the packages is perfectly elastic. To what height does the package of mass m rebound
A golf ball is sent flying at an angle of 35 degrees for a total flight time of 5 seconds. Landing at the same level from which it took off, what was the horizontal distance in feet traveled by the ball
Suppose you walk 3.97 m down a 30° incline while holding a 1.05 kg block. The 3.97 m distance is measured as a displacement along the incline; not as a vertical change in height. How much work do you do on the block as you walk down the incline.
You drive on Interstate 10 from San Antonio to Houston, half the time at 63 km/h and the other half at 86 km/h. What is your average speed for the entire trip
A vertical spring (spring constant = 119 N/m) is mounted on the floor. A 0.390 kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic motion. The block is not attached to spring.
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