An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velocity of sound is 345.0 m/s. The observer and the ambulance are traveling toward each other at a velocity of 24.00 m/s. If the ambulance is stationary, what is the frequency of the siren perceived by the observer?

Estimate the mass of the sled : Near the South Pole, a supply plane going at 120 mph drops a 60 kg supply package into a sled that was initially at rest. Estimate the mass of the sled |

What is net income : The tax benefit of the loss amounts to $123,000. If income from continuing operations (net of tax) amounted to $1,300,500 what is net income? |

How long is the column of air : A standing wave in a column of air with both ends open has a frequency of 440 Hz. The next higher harmonic has a frequency of 700 Hz. How long is the column of air |

What factors could contribute to the starting material peak : On the gas chromatography graph, 3 peaks will result along with the fourth peak being the starting material, which is suppose to be a small peak. What factors could contribute to the starting material peak to be very large |

What is the frequency of the siren perceived by the observer : An ambulance is generating a siren sound at a frequency of 2,000 Hz. The velocity of sound is 345.0 m/s. what is the frequency of the siren perceived by the observer |

Calculate her upward acceleration : An "extreme" pogo stick utilizes a spring whose uncompressed length is 34 cm and whose force constant is 1.2×104 N/m. Calculate her upward acceleration, in g's at that moment |

How much is niles cost of goods : Assume Nile.com began April with 14 units of inventory that cost a total of $266. During April, Nile purchased and sold goods as - Under the FIFO inventory method, how much is Niles cost of goods sold for the sale on April 14? |

Explain what is the uncertainty in its position : An electron traveling at 3.37 * 10^5 m/s has an uncertainty in its velocity of 8.99 * 10^4 m/s. What is the uncertainty in its position |

What is total shareholders equity at the end of 2011 : Purchased 3,000 shares of treasury stock at $10 (part of the 20,000 shares issued at $8). What is total shareholders' equity at the end of 2011? |

## How fast is she going while she reaches the bottomTwo long, parallel wires, each with the mass per unit length of 43 g/m, are supported in a horizontal plane by 6-cm long strings. Each wire carries the similar current, I, causing the wires to repel each other so that the angle, θ, between the sup.. |

## The average acceleration of the dog has magnitude 0.44A basketball star covers 2.6 m horizontally in a jump to dunk the ball. His motion through space can be modelled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02m when he leaves the floor. It reaches a.. |

## What would happen to the tensionsAs part of a safety investigation, two 1900 kg cars travelling at 19 m/s are crashed into different barriers. Determine the average forces exerted on (1) car that hits a line of water barrels and takes 1.7 s to stop, and (2) car that hits a concre.. |

## Compute the angular velocity of the sphereA solid, uniform sphere of mass 2.0 kg and radius 1.7 m rolls without slipping down an inclined plane of height 6.7 m. What is the angular velocity of the sphere |

## Determine the density of the materialA standard 1 kilogram weight is a cylinder 44.0 mm in height and 40.0 mm in diameter. What is the density of the material |

## Find the net electric field at the originElectrons are located at the points (0,1), (3,4), (1, 2). Find the net electric field at the origin |

## What is the speed of five-car trainA man pushes a lawn mower on a level lawn with a force of 186 N. If 35 percent of this force is directed downward, how much work is completed by the man in pushing the mower 6.5 m. |

## How far away is the mountain that reflected the sound waveA group of hikers hears an echo 1.50 s after shouting. If the temperature is 24.0°C, how far away is the mountain that reflected the sound wave |

## Find how much is the spring compressed by the woodA block of wood of mass m1 = 1.00 kg slides to the right on a frictionless horizontal table with a speed of 30.00 m/s. How much is the spring compressed by the wood |

## How high was the bridgeOn a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and I estimated that they hit the water 1 s later. |

## How much charge in micro-coulombs was exchangedAfter they have exchanged charge and are placed 24 cm apart the magnitude of the electric force is now 3.6 Newtons. How much charge, in micro-coulombs, was exchanged |

## What horsepower is required of the air conditioner motorAn air conditioner operating between 86°F and 72°F is rated at 4000 Btu/h cooling capacity. What horsepower is required of the air conditioner motor |

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