A physicist has developed a device that generates a beam of alpha particles (each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons). The device ejects a steady stream of 5420 alpha particles per second. You are testing different shielding materials for a test chamber that will house the alpha particle generator. You prepare a sheet of one potential material in an electrically neutral state, mount it on a perfectly insulating stand, and fire the alpha particle device at it for 22.3 seconds. Afterward, you measure that the charge of the sheet is 4.33 × 10-15 coulombs. Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles either were captured by the shielding or penetrated completely through the shielding. What percentage of the alpha particles penetrated completely through the shielding material?

What polarity of charge should the rod possess : Assume the balloon and rod to be point charges. The Coulomb force constant is 1/(4? ?0) = 8.99 × 10^9 N·m2/C2 and the acceleration due to gravity g = 9.81 m/s2. |

Discussion on the best strategic plan : Discuss fully, the best strategic plan one of your employer's has (had) and the worst strategic plan one of your employer's has had. Do not name the organization, just use XYZ. |

Computing sample proportion : Suppose you conduct survey asking people if they support something or if they like some product or if they watch some TV-show. |

Complaining about harsher grading : one class of 40 students complain that they were harshly graded in the examination as l0 students received A or B ; 17 received a C ; and the rest received a D or lower. QUESTION: Is the class's complain about harsher grading justified? ( use a : 0.. |

What percentage of alpha particles penetrated completely : A physicist has developed a device that generates a beam of alpha particles (each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons). |

Creating c chart at 99.73 percent levels : Airlines lose thousands of checked bags every day, and America South Airlines is no exception to the industry rule. Over the past 6 weeks, the number of bags "misplaced" on America South flights has been 18, 10, 4, 6, 12, and 10. |

Confidence interval-state education agency : A state education agency designs and administers high school proficiency exams. Historically, time to complete the exam was an average of 120 minutes. |

How many electrons are also emitted : For a particular collision you detect the emitted products and find 15 protons, 2 antiprotons, 6 positrons, and 25 neutral particles. How many electrons are also emitted? |

Chi-square distribution table : A random sample of size 16 is chosen from a population and a 90% confidence interval for the standard deviation will be determined. What value of should be located in the chi-square distribution table? |

## What is the spring constant of elastic cordThe fuel gage for a gasoline tank in the car reads proportional to the bottom gage pressure .if the tank is 30cm deep and accidentally contains 2 com of water plus gasoline how many centimetres of air remain at the top when gage erroneously reads .. |

## Find the velocity of the sailboatA string with linear density 2g/m is stretched along the positive x-axis with tension 20 N. One end of the string, at x = 0, is tied to a hook that oscillates up and down at a frequency of 100 Hz with a maximum displacement of 1.0 mm. At t = 0s, t.. |

## What is the velocity of the second ballYou are on a bridge which is a height 30m above the water. You first drop a ball and then 1.5 seconds later throw a second ball down so that both balls hit the water at the same time. |

## Find the final volume of gasIf a metric ton is 1 x10^3 kg, how many 88 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton. |

## What is the magnitude of each of these forcesEach surface exerts a force on the bottle that is perpendicular to the surface. What is the magnitude of each of these forces. |

## Establish angles subtended by the moon and the sunEstablish angles subtended by the moon and the sun |

## Through what distance does the point move downWhen the walkway exerts a load force of 9900 N on one of the support points, through what distance does the point move down? |

## What is the net upward force on an airplane wingA 10.00kg box on a smooth, frictionless, horizontal surface experiences a downward force of 30n at an angle of 40 degrees to the horizontal. The box moves 1.50 m to the right. What was the work done by gravity. |

## Find out the translational acceleration of the airplaneA model airplane with mass of 0.754 kg is tethered by a wire so that it flies in a circle 29.5m in radius. The airplane engine provides a net thrust of 0.796 N perpendicular to tethering wire. |

## Find components and magnitude of turtle average velocityA turtle ambles leisurely-as turtles tend to do-when it moves from a location with position vector r1,x = 1.49 m and r1,y = -2.77 m in a lettuce garden to another location, with position vector r2,x = 3.77 m and r2,y = -4.19 m, where the lettuce a.. |

## What is the magnetic flux through desk surfaceTwo 12-cm-diameter charged rings face each other, 17.0 apart. Both rings are charged to + 40.0. What is the electric field strength at the midpoint between two rings. |

## How high above the ground will the ballJulie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 13.0 m/s at an angle 52.0 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the gr.. |

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