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A racecar approaches the start/finish line of a race track with a speed of 100 m/s. A speaker (called the ground speaker) next to the start/finish line emits a tone of frequency 256 Hz (middle C on a piano). A second speaker on the racecar (called the car speaker) also emits a tone of frequency 256 Hz. A listener on the ground hears the car speaker at a Doppler shifted frequency. The driver of the car hears the ground speaker at a Doppler shifted frequency as well. Take the speed of sound in air to be 340 m/s. A) The Doppler shifted frequency observed by the person on the ground is Hz. B) The Doppler shifted frequency observed by the driver is Hz. C) Explain (using Physics not Mathematics) why there is a difference between the two observed frequencies even though the relative speed between both source and observer is the same in both cases.
Three boxes are connected by light strings. The force pulling on the third box is 30 N. What is the tension between box 2 and box 3
A 10 kg dog is standing on scale in an accelerating elevator. If the scale reads 5 kg, what is the acceleration of the elevator
A 165 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a battery with emf of 21.3 V. If the 165 pF capacitor stores 112 pC of charge on its plates, what is the unknown capacitance.
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 23.0m/s as it leaves the hose nozzle. Find the angle of elevation of the hose
A string 0.5 m long with mass density 0.0003 kg/m and is vibrating 200 cycles per second. What hanging mass would produce this tension
A simple harmonic oscillator has a potential energy of 25x2 Joules, a kinetic energy of 0.5v2 Joules where x is the displacement in meters and v the instantaneous velocity in m/s. determine the maximum instantaneous velocity
The electric field within the membrane separating the inside and outside of a biological cell is approximately 7.7MV/m, what is the potential difference across the membrane
A beam of light of wavelength 569 nm traveling in air is incident on a slab of transparent material. Find the index of refraction of the material
1.calculate the orbital radius of the hydrogen atom for the second principal quantum number.2.calculate the orbital
q1. to push a 47.0-kg crate up a frictionless incline angled at 34.0deg to the horizontal a worker exerts a force of
An electron ( mass = 9.11×10?31kg ) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, If the accelerating force is constant, compute the acceleration of the electron
A 3-m2 hot black surface at 80°C is losing heat to the surrounding air at 25°C by convection with a convection heat transfer coefficient of 12 W/m2.°C, Determine the total rate of heat loss from the surface
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