What is the velocity of the police car

Reference no: EM13564836

While standing at a crosswalk, you hear a frequency of540 Hz from an approaching police car.After the police car passes, its frequency is 480 Hz. What is the velocity of the police car?(speed of sound in air = 343 m/s)

Reference no: EM13564836

Questions Cloud

Determine the size of the beam with the least cross-section : A simple beam of Douglas-Fir Larch, select grade, has a span of 18 ft with two concentrated loads of 3 kips each placed at the third points of the span. Neglecting its own weight, determine the size of the beam with the least cross-sectiona; area bas..

Calculate the depth of flow upstream of the bridge assuming : A tensile test was performed on a metal specimen having a circular cross section with a diameter of 0.50 inch. The gage length is 2 inches. For a load of 13.5 kips, the elongation was 4.66 x 10-3 inches. If the load is assumed to be within the linear..

Find which dam would need to be constructed more strongly : If a large lake is held back by a dam that is equallylong and equally deep compared to another body of water, but is anarrow river, which dam would need to be constructed more strongly

What was the rovers weight when it was at sea level on earth : When the Mars Exploration Rover was fully assembled, its mass was 180 kg. The acceleration due to gravity at the surface of Mars is 3.68 m/s2. a) What was the rover’s weight when it was at sea level on Earth? b) What is the rover’s weight on the surf..

What is the velocity of the police car : While standing at a crosswalk, you hear a frequency of540 Hz from an approaching police car. What is the velocity of the police car

What is thefrequency of the sound heard by the crew : An aircraft carrier has a speed of 13.0 m/s relative to thewater. What is thefrequency of the sound heard by the crew on the ship

Determine the stack-gas so2 concentration in units of micro : The sulfur dioxide (SO2) stack-gas concentration from fossi-fuel combustion is 2 ppmv. Determine the stack-gas SO2 concentration in units of micro grams/m^3. Assume 0C and 1 atm pressure

Find what is the minimum angle the ladder can make : A 3.0-m-long ladder leans against a frictionless wall. What is the minimum angle the ladder can make with the floor without slipping

Estimate the population for the year 2011 assuming : In 1800 an undeveloped country had a population of 10 million with birth and death rates of 60 and 52 per thousand per year. The situation continued until 1900, when the death rate instantaneously was reduced to 10, but the birth rate remained consta..

User Account

All Pages