Two identical speakers are separated by 3.4m and produce sound of different frequencies equally in all direction. Left speaker has an output of 1.3mW, and right speaker has an output of 1.6mW. Determine the sound level in decibels at the point that is a midway between the speakers.

What is the force from the wall on the ladder : Your 85-kg friend (modeled in the picture as a box) is a window-washer and leans a ladder against a large frictionless window. What is the force from the wall on the ladder |

Describe realistic investment problem for none of choice : Assuming we are still in a world with only discrete investment choice, i.e., option A, option B, etc., describe a realistic investment problem where none of the environments discussed apply without some reframing. |

What is the final rotational kinetic energy of the dough : You are visiting a pizza parlor and watch the chef make a pizza crust. He throws a spinning disk of dough in the air. Its angular velocity is 15 rad/s. What is the final rotational kinetic energy of the dough |

What is the value of the resistor : A 25.0-mH inductor, a 2.00-%u03BCF capacitor, and a certain resistor are connected in series across an ac voltage sourceat 1000 Hz. what is the value of the resistor |

Determine the sound level in decibels at the point : Two identical speakers are separated by 3.4m and produce sound of different frequencies equally in all direction. Determine the sound level in decibels at the point that is a midway between the speakers |

Determine the average shearing stress in the bolts : A composite beam is made by attaching the timber and steel portions with bolts of 14-mm diameter spaced logitudinally every 200 mm. The modulous of elasticity is 10 GPa for the wood and 180 GPa for the steel. |

Find the period of the pendulum : A simple pendulum has a length of 52.4 cm and makes 83.7 complete oscillations in 2.00 min. Find the period of the pendulum |

Determine the most economical design of system to deliver : You are the Chief Engineer for a prominent hydraulics consulting company. Your client wants to pay you lots of money to design a system to deliver 1 m3/s from reservoir A at elevation 300 m to reservoir B at 500 m. |

Find the minimum frequencies heard by astationary listener : A whistle of frequency 500 Hz moves in a circle of radius 1 m at3 rev/s. What are the maximum and minimum frequencies heard by astationary listener |

## What was the initial speed given to the rockA soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. what was the initial speed given to the rock |

## Compute the atomic mass number of the unknown nucleusAn unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus |

## Find how much heat is transferred from the water to cool itA bottle containing 3.4 kg (mass) of water at a temperature of 23.4 oC is placed in a refrigerator where the temperature is kept at 3.2 oC |

## What was the bullets flight timeA classroom slide projector projects an enlarged (50 times taller) image of a 24mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does the slide projector require to produce a sharply focus i.. |

## Compute the emf of the coilA 1000-turn coil of wire that is 2.4cm in diameter is in a magnetic field that drops from 0.15T to 0 T in 11ms, compute the emf of the coil |

## Establish the initial volume of the gasEstablish the initial volume of the gas . What is the magnitude of normal force that each brake pad applies to the rim. |

## What is the intensity of moonlight at the earthMoonlight is primarily reflected sunlight. If the moon reflects 15% of the photons that strike its surface, and we know that the intensity of sunlight at earth is I, what is the intensity of moonlight at the Earth during a full moon |

## Illustrate what force does the ground exerts on herIf the parachutist comes to rest with constant acceleration over a distance of 0.710 m, illustrate what force does the ground exerts on her? |

## What is the maximum distance the bear can walkHelium (He), a monatomic gas, fills a 0.012 m3 container. The pressure of the gas is 6.90x 10^5 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy equal to internal energy of this gas. |

## What is the radiation pressureA tungsten filament incandescent light bulb emits spherical electromagnetic waves of 50 Watts isotropically. What is the radiation pressure |

## How many radians does the smaller wheel turntwo gear wheels with radius of 25 cm an 60 cm have interlocking teach. How many radians does the smaller wheel turn |

## Compute the change in length of the rodAn aluminum rod is 17.0 cm long at 20°C and has a mass of 350 g. what is the change in length of the rod |

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