A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.8 rad/s2. (a) How long does it take the discus thrower's speed to get to 3.5 rad/s? (b) How many revolutions does the thrower make to reach the speed of 3.5 rad/s? revolutions (c) What is the linear speed of the discus at 3.5 rad/s? (d) What is the tangential acceleration of the discus thrower at this point? (e) What is the magnitude of the centripetal acceleration of the discus thrown? (f) What is the magnitude of the discus's total acceleration?

About the bottom end of rod after being given slight nudge : A thin, cylindrical rodscript l=24.6cmlong with a massm= 1.20 kghas a ball of diameterd=10.00cmand massM= 2.00 kgattached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The co.. |

Calculate the average force exerted on the block : A 10 g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. (a) (5 pts) How much energy was lost in the collision? |

Emf device is placed across two resistors in series : When a 23.0-V emf device is placed across two resistors in series, a current of 14.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 61.0 A. Wh.. |

What is the expansion coefficient of the combined rod : An aluminum rod 10.0cm long and a steel rod 80.0cm long are combined to form one rod with a total length of 90.0cm. The initial temperature of both rods is 15 degrees celcius. The expansion coefficient of aluminum is 2.4*10^5 and the expansion coeffi.. |

What is the magnitude of the centripetal acceleration : A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.8 rad/s2. (a) How long does it take the discus thrower's speed to get to 3.5 rad/s? |

Calculate the change in electric potential energy of system : Two particles each with charge +1.86 µC are located on the x axis. One is at x = 1.00 m, and the other is at x = ?1.00 m. (a) Determine the electric potential on the y axis at y = 0.320 m. .... kV (b) Calculate the change in electric potential energy.. |

Compare the probabilities for an oscillating particle : Compare the probabilities for an oscillating particle in its ground state to be found in a small interval of width dx at the center of the well and at the classical turning points. |

Friction between cannon and the ground : A cannon with a mass of 115 kg shoots a cannonball with a mass of 8 kg. If the speed of the cannon ball as it leaves the cannon is 185 m/s,what is the speed of the cannon at that time??(assume cannon is initially at rest,not fastened down in any way,.. |

What are the x n y component of their final velocity : An 80 kg hockey player is gliding down the ice with a velocity of 7.5 m/s in +ve x directon.he is hit by a defensive player of mass 105 kg ans an initial velocity of 4.5m/s in -ve y direction.if the players experience a completely inelastic collision.. |

## How long will it take the battery to completely dischargeA car owner forgets to turn off the headlights of his car while it is parked in his garage. how long will it take the battery to completely discharge |

## Find the change in magnetic flux and induced emfthe magnetic field perpendicular to a circular coil of 5 turns and diameter 20cm changes from +1.85 T to -.25 T in 30 ms. Find the change in magnetic flux and induced emf |

## Estimate the size of the depositA geologist searching for oil finds that the gravity at a certain location is 8 parts in 107 smaller than average. Estimate the size of the deposit |

## Determine the inductive reactance requiredHow large an inductance, in henrys (H), should be connected in series with a 120 V, 60 W lightbulb if it is to operate normally when the combination is connected across a 240 V, 60 Hz line? (First determine the inductive reactance required. You may n.. |

## How much helium is lost per hourA physicist uses a cylindrical metal can 0.300m high and 0.070m in diameter to store liquid helium at 4.22 K; at that temperature the heat of vaporization of helium is 2.09×104J/kg. How much helium is lost per hour |

## Find the vertical distance between these two pointsA thin stream of water flows smoothly from a faucet and falls straight down. What is the vertical distance h between these two points |

## Find out the height of the compressed airWater is pumped into the tank until the air pressure reaches 4.0 atm. The temperature is constant. Find out the height of the compressed air. |

## Obtain the speed of the carA siren at rest has a frequency f0. Standing at a crosswalk, a student hears a frequency f' from the siren in an approaching police car. find the speed of the car |

## How much work does harold perform on the baseballHarold the Hurler is a physics student who is renowned for his baseball pitching arm. In order to determine the amount of work he performs in throwing a baseball, How much work does Harold perform on the baseball |

## Find the height difference between the two sides of crevasseA mountain climber jumps a 2.4 -wide crevasse by leaping horizontally with a speed of 7.2. find the height difference between the two sides of the crevasse |

## Determine how would humps effect the final speedChildren are playing on a vertical slide that is 10m high. If humps were added to this slide, but the height remained constant, how would this effect the final speed |

## How many hours does it take this satellite to make one orbitOn July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere, How many hours does it take this satellite to make one orbit |

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