The sound level of a lamborghini's engine starting is 80.8dB. the noise level of the lamborghini driving past a sensor is 120.1dB. how many times louder is the noise of the lamborghini driving than the engine starting? Put answer to 2 decimal places.

Two strings both vibrate at exactly 764 Hz. The tension in one of them is then increased slightly. As a result, 6 beats per second are heard when both strings vibrate. What is the new frequency of the string that was tightened?  Calculate to one decimal.

10 B. Suppose that you put your left ear down against a railroad track, and your friend one kilometer away strikes the track with a hammer. a). How much sooner will the sound get to your left ear than to your right ear? (The speed of sound is about 5950 m/s in steel and 340 m/s in air.) b). Draw a sketch to support your results and include given information, formulas and calculations. Your answer

Two strings both vibrate at exactly 802 Hz. The tension in one of them is then increased slightly. As a result, 3 beats per second are heard when both strings vibrate. What is the new frequency of the string that was tightened?  Calculate to one decimal.

The noise a lawn mower produces is 80 dB. How much noise is from 12 identical lawn mowers?

1. The noise from a power mower was measured at 109 dB. The noise level at a rock concert was measured at 118 dB. Find the ratio of the intensity of the rock music to that of the power mower. (Round your answer to the nearest whole number.) 2. The decibel level of the sound of a subway train was measured at 98 dB. Find the intensity in watts per square meter (W/m2). (Give your answer in scientific notation, correct to one decimal place.) (blank) × 10(blank) W/m2

A bat sends out a sends a signal of 50.0 kHz and receives a returned signal from an object moving away at 27.5 m/s. What is the frequency of the returned signal?

An ambulance with a siren emitting a whine at 1570 Hz overtakes and passes a cyclist pedaling a bike at 2.54 m/s. After being passed, the cyclist hears a frequency of 1560 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.) Number i Units

A stone is dropped into a mine shaft 250 m deep. How many seconds pass before the stone is heard to strike the bottom of the shaft?