Birds resting on a high-voltage power lines are a common sight. A certain copper power line carries a current of 52.7 A, and its resistance per unit length is 1.15 10-5 /m. If a bird is standing on this line with its feet 4.0 cm apart, what is the potential difference across the bird's feet?

Explain the larger hydronium ion concentration : Solution A has a hydronium ion concentration of 3.8 X 10-8 M. Solution B has a hydronium ion concentration of 2.5 X 10-4 M. which solution has the larger hydronium ion concentration. and which solution has the larger pH. |

What mass of stone is required if temperature is not droped : The thermal mass can be a large quantity of stone (with specific heat 800 J/kg °C) in the floor and the interior walls exposed to sunlight. What mass of stone is required if the temperature is not to drop below 18°C overnight |

First big case is a multiple murder : First big case is a multiple murder |

Compute the direct materials price and quantity variances : Compute the direct materials price and quantity variances.(Input all amount as a positive value. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect. |

What is the potential difference across the birds feet : A certain copper power line carries a current of 52.7 A, and its resistance per unit length is 1.15 10-5 /m. If a bird is standing on this line with its feet 4.0 cm apart, |

Explain butanol and 3-methyl-1-butanol : 3-methyl-1butyne yields 2-methyl-2- butanol and 3-methyl-1-butanol by different mechanisms. In each case, a second alcohol would also be obtained. What alcohol would it be |

Determine how many electrons were transferred : The two items attract one another with a force of strength 0.6 N when they are 1 cm apart. If they have equal but opposite charges, a) what is the magnitude of the charge |

Explain dihydrogen citrate : Can the five percent approximation be applied in determining the pH of the following solutions? Yes No 8.07×10-3 M dihydrogen citrate ion Yes No 7.51×10-5 M chlorous acid Yes No 4.38×10-2 M carbonic acid Yes No 1.44×10-2 M hydrocyanic acid |

A brief review of the powers and responsibilities of the gla : )A brief review of the powers and responsibilities of the GLA and the Mayor |

## Calculate the magnitude of the velocity of the tennis ballA ping-pong ball of mass 4 gm and traveling with a velocity of 4 m/s collides with stationary tennis ball of mass 5 gm. Calculate the magnitude of the velocity of the tennis ball after the collision |

## How many more electrons than protons are in the blockA large plastic block has a net charge of -1.0mC. How many more electrons than protons are in the block |

## Find the change in the internal energy of the environmentA system does 167 J of work on its environment and gains 85.5 J of heat in the process, Find the change in the internal energy of the environment |

## Define what is the acceleration experienced by the tipA 52 {rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5 {rm m}. Biometric measurements indicate that each hand typi.. |

## At what rate does the box accelerate down the slopeA 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. at what rate does the box accelerate down the slope |

## What is the maximum displacement the mass will achieveA spring with a constant 150 N/m is attached to a block with a mass 1.5 kg. What is the maximum displacement the mass will achieve |

## At what angle does the light reaching the edge of the poolAt t=0 a grinding wheel has an angular velocity of 25 rad/s. It has a constant angular acceleration of 35.0 rad/s^2 until a circuit breaker trips at time t = 2.10 s. From then on, it turns by an angle 431 rad as it coasts to a stop at constant ang.. |

## Find the speed of one spaceship relative to the otherAn observer sees two spaceships moving in opposite directions, Find the speed of one spaceship relative to the other |

## What is the particles lifetime at rest in secondsA certain type of elementary particle travels at a speed of 2.75×108m/s. What is the particles lifetime at rest in seconds |

## What is the pipes diameter at the refineryA round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 59.7 cm (0.597 m) and the flow speed of the petroleum is 10.7 m/s. what is the pipe\'s diameter at the refinery |

## Residence time of waterA stable and highly soluble pollutant is dumped into a lake at the rate of 0.19 tonnes per day. The lake volume is 2E7 m3 and the average water flow-through rate is 8E4 m3 per day |

## At what angle is the incline oriented above the horizontalA skateboarder, with an initial speed of 2.0 m/s, rolls virtually friction free down a straight incline of length 18m in 3.3s. At what angle is the incline oriented above the horizontal |

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