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A fire engine moving to the right at 40 m/s sound its horn (frequency = 500 Hz) at the two vehicles shown in the figure. The car is moving to the right at 30 m/s, while the van is at rest. (a) What frequency is heard by the passenger in the car? (b) What is the frequency as heard by the passengers in the van? (c) When the fire engine is 200 m from the car and 250 m from the van, the passengers in the car hear the sound intensity level of 90 dB. At that moment, what intensity level is heard by the passenger in the van?
A textbook of mass 2.08kg rests on a frictionless, horizontal surface. What is the tension in the part of the cord attached to the textbook
A clay ball with a mass of .35 kg has an initial speed of 4.2 m/s. What is the decrease in Kinetic energy of the .35kg ball
A 2.5-mC charge is on the y-axis at y=3.0 m and a 6.3-mC charge is on the x-axis at x=3.0 m. What is the direction of the electric potential at the origin
When ultraviolet light with a wavelength of 254 nm falls upon a clean metal surface, What is the photoelectric threshold wavelength for this metal
A proton moves perpendicular to a uniform magnetic field at a speed of 1.90 107 m/s and experiences an acceleration of 2.90 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction ..
Consider a wet banked roadway, where there is a coefficient of static friction of 0.30 and a coefficient of kinetic friction of 0.25 between the tires and the roadway. what is the maximum speed the automobile can have before sliding up the banking
At Earth location, the intensity of sunlight is 1.5 kW/m2. by how much would Earth's mass increase in 1 day
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
A 9.0 V battery and three resistors are all connected in series. What is the potential difference across the third resistor
A proton collides elastically with a stationary deuteron. If the proton is deflected by 37 degrees, what fraction of its kineti energy does it transfer to the deuteron.
A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.58c and the exploration vehicle approaching at a speed of 0.73c. What is the speed of the explo..
An individual uses a pulley and rope to raise a 25 kg mass to a height of 2.0 m. If it takes 5.0 seconds to do this, how much power was supplied
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