A dynamite blast at a quarry launches a rock straight upward, and2.5 s later it is rising at a rate of 18 m/s. Assuming airresistance has no effect on the rock, calculate its speed(a) at launch and (b)5.3 s afterlaunch

## Origin of anxy coordinate systemA particle of charge Q is fixed at the origin of anxy coordinate system. At t = 0 a particle(m = 0.776 g, q = 5.04 µC is located on thex axis at x = 18.7 cm, moving with a speed of39.8 m/s in the positive y direction. |

## Electric field intensityStandard mathematical constants and symbols (e.g. pi), you may only use the symbols shown in the figure and question description - Which of the following plots correctly represents the electric field intensit |

## Find how far apart are the half-kilogram marks on the scaleFish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale |

## Determine the percent of the work is lost to frictionA 4.3- kg box of books is pulled up a 4.76- m-long inclined plank to a height of 1.4 m. What percent of the work is lost to friction |

## How to compute the density of the oilA major-league catcher gloves a 93 mi/h pitch and brings it to rest in 0.14m. If the force exerted by catcher is 803 N, what is the mass of the ball. |

## Find the displacement of car from the point of originTwo runners of mass 70kg and 60kg, respectively, have a total linear momentum of 350 kg•m/s. The heavier runner is running at 2.0 m/s. Determine the likely speeds of the lighter runner. |

## In what direction do the electrons travelIf a current of 80.0 mA exists in a metal wire, In what direction do the electrons travel with respect to the current |

## Estimate the velocity of the second ball after collisionA billiard ball A moving at 5.00m/s hits another ball B, initially at rest, of the same mass. Find the velocity (magnitude and direction) of the second ball after the collision |

## How much total mechanical energy was lost in the fallA 12 gram ball is dropped form a height of 2.50m and is moving and is moving at 3.2m/s just before it hits the floor. how much total mechanical energy was lost in the fall |

## Find the energy density in the electric field near surfaceA charged isolated metal sphere of diameter 26.0 cm has a potential of 8400 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere |

## What is the wave length of this new lightA single slit forms a diffraction pattern, with the first minimum at an angle of 40.00 (degree) from central maximum, What is the wave length of this new light |

## How much gasoline is burned during each cycleA gasoline engine in a large car takes in 10,500J of heat and delivers 2450J of mechanical work per heat cycle. How much gasoline is burned during each cycle |

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