A fluid with viscosity ? flows through a tube of radius R and length L. A second fluid with viscosity 4? flows through another tube of the same length. The same pressure difference exists across both tubes. What must be the radius of the second tube so that both fluids have the same volume flow rate? Give answer in terms of R.

What is the average force exerted on the walls of the flask : A 290-mL spherical flask contains 0.075 mol of an ideal gas at a temperature of 345 K. What is the average force exerted on the walls |

Molecular and cellular biology : Give 3 debatable topic plus relatable questions with the topic that is scientifically based. In particularly, Molecular and Cellular Biology. |

A prevalence survey conducted : A prevalence survey conducted from Jan 1 through Dec 31 2003 identified 1,000 cases of schizo. in a city of 2 million. The incidence rate of schizo. is 5/100,000 persons/year. What % of the 1,000 cases were newly diagnosed? |

Calculate for silver the resistivity and the mobility : If 100 meters of silver wire 2 mm in diameter required 8.1 watts when carrying 4 amps of current, calculate for silver the (a) resistivity, (b) mobility, (c) collision time, (d) mean free path, (e) Hall coefficient, and (f) the Hall field in a tra.. |

What must be the radius of the second tube : A fluid with viscosity ? flows through a tube of radius R and length L. What must be the radius of the second tube |

Explain the stereochemistry of the substituent groups : Draw one planar structure each for the following compounds using dashed or solid wedges to show the stereochemistry of the substituent groups. To be graded properly, include the hydrogen atoms on the chirality centers (asymmetric carbons). |

Briefly describe the exhibit or performance you attended : Briefly describe the exhibit or performance you attended. Be sure to include the full information of the museum, artist, or group. Provide a brief critique of the art forum, using the language of the arts (elements of art, genre, plot, script, chara.. |

Explain relationship between average cost and marginal cost : What is the difference between an internal economy of scale and an external economy of scale? Give examples as part of your answer. |

What mass of gold is contained in the rock : A prospector finds a solid rock composed of granite (density = 2650 kg/m3) and gold, What mass of gold is contained in the rock |

## What is minimum coefficient of static frictionA 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity rel.. |

## How several electrons must be transferred from the plateA wooden raft has a mass of 45 kg. When empty it floats in water (density 1000 kg/m3) with 68% of its volume submerged. What mass of sand could be put on the raft without it sinking. |

## Explain by how much did the ball clear the netThe ball leaves his racket with a speed of 16.0 m/s at an angle 5.5 degrees above the horizontal. The horizontal distance to the net is 7.0 m and the net is 1.0 m high. Explain by how much did the ball clear the net? |

## Assume the bullets deceleration to be constantTwo people stand 3 m in front of large plane mirror and space 5m a part in dark room at what angle of incidence should one of them shine a flashlight on the mirror so that reflected beam directly strickes the other person. |

## What is the moment of inertia of the diskA disk with mass m = 8.5 kg and radius R = 0.35 m begins at rest and accelerates uniformly for t = 18.8 s, to a final angular speed of ? = 28 rad/s. What is the moment of inertia of the disk? |

## Find the voltage at the surface of sphereConsider two solid conducting spheres of radii r1 = 2 cm and r2 = 3 cm. Sphere 1 initially carries a net charge of +6 ?C, What is the voltage at the surface of sphere 1? What is the net charge on sphere 1? On sphere 2 |

## Determine the maximum speed that the carDetermine the maximum speed that the car. A boy riding on the back of the truck throws a can of soda upward and catches the projectile at the similar location on the truck bed. |

## The particle arrives at b with twice the speedThe potential at location A is 392 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 780 V, and when released from rest from this spot, the particle arrives at B wit.. |

## What is the acceleration of the lawn mowerA 15 kg lawn mower is pushed with a constant force of 30.0 N at an angle of 37.0 degrees. What is the acceleration of the lawn mower |

## Find the unknown mass m3Three blocks of mass m1=1.0 kg, m2=2.0 kg, and unknown mass m3 are on a frictionless forizontal surface, What is the unknown mass m3 |

## What is the density of the piece of metalA irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal |

## By what percent does the period of oscillation changeAt a large business, employees must report to work at 7:30 A.M. The arrival times of employees is approximately symmetric and mound-shaped with mean 7:22 A.M. and standard deviation 4 minutes. |

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