A single convex lens projects a focused image of an object onto a screen. If the lens is 15 cm from the object and and 36 cm from the screen, what is the focal length of the lens?

Determine what is the balls angular velocity : Consider a tennis ball that is hit by a player at the baseline with a horizontal velocity of 50 m/s (about 110 mi/h). What is the ball's angular velocity |

Explain the chemical formula of salt : State the chemical formula of salt and classify the bond as ionic, polar covalent or non covalent |

What is the magnitude of the angular acceleration of pulley : A uniform, cylindrical pulley of mass M=12.7 kg and radius R=0.636 m rotates freely about a fixed horizontal axis. What is the magnitude of the angular acceleration of the pulley |

State how to synthesize 2-methyl-2-pentene from alkyl halide : Show how to synthesize 2-methyl-2-pentene from an alkyl halide and an aldehyde or ketone, plus any other reagents. Show the products that forms when 3-phenylpropanal is allowed to mix with sodium hydroxide catalyst |

Compute what is the focal length of the lens : A single convex lens projects a focused image of an object onto a screen. If the lens is 15 cm from the object and and 36 cm from the screen, what is the focal length of the lens |

What is the power output of the bacterium : Work and Power problem in physics A bacterium moves through water at a constant velocity. The bacterium uses it's flagellum to push on the water behind it to help it overcome the drag force of the water opposing it's motion, what is the power outp.. |

3-phenylpropanal is permited to mix with sodium hydroxide : Show the product that forms when 3-phenylpropanal is allowed to mix with sodium hydroxide catalyst. |

Find the magnitude of angular velocity of the cat-dis system : A uniform circular disk (merry-go-round) of radius R=1.76 m and mass M=28.4 kg freely rotates about a vertical axis, What is the magnitude of the angular velocity of the cat/disk system |

Define gas can be made by reacting red-hot coal with steam : Synthesis gas can be made by reacting red-hot coal with steam. Estimate the temperature at which the equilibrium constant for the reaction is equal to 1. |

## From what height above the top of the window did stone fallA falling stone takes ?t = 0.26s to travel past a window2.2 m tall, From what height above the top of the window did the stone fall |

## What is the angular speed of the spinning sticka uniform stick 1.5 meters long With a massive 220 kg is pivoted at its center a 3.9 kg bullet is shot through the stick midway between the pivot, What is the angular speed of the spinning stick |

## What is the final velocity of the combined railroad carsA 10000 kg empty railroad car moving at 3 m/s collides with a loaded railroad car weighing 196000 N and couples with it. What is the final velocity of the combined railroad cars |

## Compute the wavelength of the photon before the collisionA photon is scattered 60.0° during a collision with an electron, Find the wavelength of the photon before the collision |

## Estimate the maximum distance at which siren can be heardThe sound intensity 44 m from a wailing tornado siren is 0.10 W/m2 -. Estimate the maximum distance at which the siren can be heard |

## What are the initial and final kinetic energies of systemOn a touchdown attempt, a 95.0 kg running back runs toward the end zone at 3.75 m/s. What are the initial and final kinetic energies of the system |

## How many electrons must be added to make the ball neutralIf a ball has a net positive charge of 57 ?C, how many electrons must be added to make the ball neutral |

## Find how close to her eye can an object beElizabeth is nearsighted. Without glasses, she can see objects clearly when they are between 15.0 cm and 90.0 cm away from her eyes. how close to her eye can an object be before it appears out of focus |

## Determine the maximum speed of the jumperThe Royal Gorge bridge over the Arkansas River is 310 m above the river. A 61-kg bungee jumper has an elastic cord with an unstressed length of 60 m attached to her feet. Assume that, Find the maximum speed of the jumper |

## What is the radial acceleration of the bobConsider a conical pendulum with a 86.0 kg bob on a 10.0 m wire making an angle of ? = 7.00° with the vertical. What is the radial acceleration of the bob |

## Find magnitude of electrostatic force that acts each sphereTwo very small spheres are initially neutral and separated by a distance of 0.66 m. What is the magnitude of the electrostatic force that acts on each sphere |

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