A potter's wheel having a radius 0.45 m and a moment of inertia of 11.4 kg · m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 74 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag

Sinusoidal electromagnetic wave having magnetic field : A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.35 mu T and a wavelength of 434 nm is traveling in the +x direction through empty space. What is the frequency of this wave? Hz What is the amplitude of the associated electric .. |

How large is the force exerted by the right-hand cable : A house painter is standing on a uniform, horizontal platform that is held in equilibrium by two cables attached to supports on the roof. How large is the force exerted by the right-hand cable |

Two circular loops with different currents but same radius : In Figure (a), two circular loops with different currents but the same radius of 10. cm, are centered on a y axis. They are initially separated by distance L = 7.5 cm, with loop 2 positioned at the origin of the axis |

Use one of more of the nonmonotonic reasoning system : Use one of more of the nonmonotonic reasoning system |

A potters wheel having a radius : A potter's wheel having a radius 0.45 m and a moment of inertia of 11.4 kg · m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 74 N. Find the effe.. |

What are the first three energy levels of the electron : An electron is confined in a harmonic potential well that has a spring constant of 1.50 N/m. What are the first three energy levels of the electron |

Desired temperature increase has been achieved : You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 34.9C . The only thermometer you can find at your workbench reads in degrees Fahrenheit. If the initial temperature of the sample is 75.0F, what.. |

Calculate the horizontal retarding force on the mower : A person pushes a 13.0 kg lawn mower at constant speed with a force of 74.0 N directed along the handle, which is at an angle of ? = 40.0° to the horizontal (Fig. 4-40).b.Calculate the horizontal retarding force on the mower |

Explain oxidation-reduction reactions : Identify which of the following reactions are acid-base reactions and which are oxidation-reduction reactions. a. For those which are redox reactions state which substance is oxidized and which is reduced. Be specific in your answers, for example .. |

## What is the wavelength in the stringA 125-cm-long, 5.0 g string oscillates in its n = 2 mode with a frequency of 190 Hz, What is the wavelength in the string |

## How far to the left of the negative charge is one spotA positive charge of q1 is located 4.40 m to the left of a negative charge q2. The charges have different magnitudes. How far to the left of the negative charge is one spot |

## Find the magnitude of the linear momentum of the ballA ball of mass 0.40 kg has a kinetic energy of 28.8 J. What is the magnitude of the linear momentum of the ball |

## Viewing screen of a double-slit experimentConsider point P on the viewing screen of a double-slit experiment. This point is 75% of the way from the center of the third bright fringe to the center of the fourth bright fringe. If the wavelength of the light is 600 nm, what is the extra distanc.. |

## How fast was the bb going just before the collisionIn an experiment to find out the muzzle velocity of your BB gun, you fire a BB straight up into a wooden block of mass 0.050 kg. How fast was the BB going just before the collision |

## Q1 an archer shoots an arrow with a velocity of 450ms at anq1. an archer shoots an arrow with a velocity of 45.0ms at an angel of 50.0 with the horizontal. an assistant standing |

## Calculate for a rectangular surface with the verticesCalculate for a rectangular surface with the vertices (b,a/sqrt(2),0), (0,a/sqrt(2),0), (0,0,a/sqrt(2)), and (b,0,a/sqrt(2)) the vectorial surface element dS (Hint: Find first a suitable parametrization of the surface). |

## Calculate the average radius of mercuryThe average density of the planet Mercury is 5510 kg/m3. The acceleration of gravity on its surface is 3.73 m/s2. Calculate the average radius of Mercury |

## Determine the minimum diameter must the wire haveA brass wire is to withstand a tensile force of 350N without breaking. What minimum diameter (in mm) must the wire have |

## How many bulbs can be lite with this powerWater flows over a section of Niagara Falls at a rate of 1.07 × 106 kg/s and falls 40 m, How many 70 W bulbs can be lite with this power |

## What is the direction of the average magnetic forceA strip of copper 3.0 cm wide carries a current I = 28.5 A to the right, What is the direction of the average magnetic force on the conduction electrons |

## How far behind the lense should we place a screenT thin lense with a focal length of 50 cm is placed 100 cm from an object. How far behind the lense should we place a screen |

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