After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction? (b) Estimate the time the ball is in contact with the floor to be 0.08 seconds. Calculate the average force the floor exerts on the ball. magnitude? direction ?

Determine what is the mass of the bar : A uniform bar balances 26.6 cm from one end. When a 0.740 kg mass is hung from that end, What is the mass of the bar |

Find how long will it take to make next complete revolution : A 1.25kg- ball begins rolling from rest with constant angular acceleration down a hill. how long will it take to make the next complete revolution |

Explain what is avogadro''s number represent : What is avogadro's number represent. How many atoms of xenon are there in one mole of xenon |

Sound intensity equal to that of normal conversation : A typical decibel level for a buzzing mosquito is 40 dB and normal conversation is approximately 50 dB. How many buzzing mosquitoes will produce a sound intensity equal to that of normal conversation? |

Determine the magnitude and direction of the impulse : After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction? |

Derive marginal productivity of capital : Determine whether the indicated products are competitive-complementary and derive marginal productivity of capital. |

Evaluate the struck balls velocity after the collision : A billiard ball moving at 6.00 m/s strikes a stationary ball of the same mass. find the struck ball's velocity after the collision |

Induced emf in the coil-induced current through the resistor : One hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0.100 m2. The circuit is completed by connecting the coil to a 10-ohms resistor. As the magnetic field along the coil axis changes from 1.00 T to 4... |

Obtain the impulse delivered to the ball by tennis racquet : A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 55.5 m/s and returns the shot with the ball traveling horizontally at 36.0 m/s in the opposite direction. find the impulse delivered to the ball by the tennis racq.. |

## Find the cross-sectional area of each wireThe rear window of a car consists of thirteen thin wires (resistivity = 88.0 * 10^-8 ohms) embedded in the glass. Find the cross-sectional area of each wire |

## Calculate the radius of the particles pathA constant, uniform magnetic field directed into this sheet exists in the region to the right of the y axis. Calculate the radius of the particles path |

## Find the magnitude of force exerted on the test chargeTwo 3.0 uC charges are placed at (3.0 cm,-2.0 cm) and (-6.0cm, 1.0cm). find the magnitude and direction of force exerted on the test charge |

## Find the direction of the second displacementA man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 150 cm, Find the magnitude and direction of the second displacement |

## Obtain the diameter of the ballA child playing in a swimming pool realizes that it is easy to push a small inflated ball under the surface of the water while a large ball requires alot of force. calculate the diameter of the ball |

## What is the potential difference measured across the platesA parallel capicitor is made of two plates with cross sectional area A which are separated by a distance d, what is the potential difference measured across the plates |

## Estimate the work done by the normal forceA snowboarder of mass 82.0 kg (including the snowboard's mass) slides straight down a "double black diamond" hill. The hill is 45 metres in length and inclined at 40° below the horizontal. Determine the work done by the normal force |

## How much work is done by the crane on the containerAt a dock, a crane lifts a 2094 kg container 14 m, swings it out over the deck of a freighter, and lowers the container into the hold of the freighter, How much work is done by the crane on the container? |

## Find the mass of the stoneA stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, Find the mass of the stone |

## Obtain how far does the point where two wires meet moveTwo steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move |

## Find the drills angular accelerationA dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.1 104 rev/min. Find the drill's angular acceleration |

## Find the value of the dielectric constantA parallel-plate capacitor is constructed with circular plates of radius 6.4×10?2 . Find the value of the dielectric constant |

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