The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. Assume that these protons are incident on the Earth's atmosphere from all directions at a rate of 1090. protons per square meter per second. Assuming that the depth of Earth's atmosphere is 100.0 km, what is the total charge incident on the atmosphere in 177.0 s? Assume that the radius of the surface of the Earth is 6378. km.

Explain the quality-improvement model for chart audits : Write down the possible procedure to perform chart audits. Explain the quality-improvement model which is to be followed. |

Probability of randomly chosen student : A small business owner is experiencing a high staff turnover and wants to design a study to investigate the problem. What is the probability of randomly chosen student scoring at least 60? |

Why is the phrase fail to reject the null hypothesis : When formulating the conclusion to the test, why is the phrase fail to reject the null hypothesis more accurate than the phrase accept the null hypothesis? |

Household security probability : Seventy-five percent of households say they woud feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. |

What is the total charge incident on the atmosphere : Assuming that the depth of Earth's atmosphere is 100.0 km, what is the total charge incident on the atmosphere in 177.0 s? Assume that the radius of the surface of the Earth is 6378. km. |

Probability-production process : A production process manufacturers alternators. On the average, 1% of the alternators will not perform properly when tested in the plant. When a large shipment of alternators is received at the plant |

What mass of ice : A 47 g block of copper at -10 C is added to 150 g of water in a 71g aluminum cup. The cup and the water have an initial temperature of 4.2 C. Find the equilibrium temperature of the cup and its contents. What mass of ice, if any, is present when t.. |

Information-probability-statistics : An industrial chemical to retard the spread of fire in paint has been developed. From past experience, 48% of sales calls will result in an order. |

What are the initial velocity : a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m. |

## How long does it take for a person to radiate the energyA typical person radiates about 62 W of power at room temperature. Given this result, how long does it take for a person to radiate away the energy obtained by consuming a 230-calorie doughnut. |

## The work done on the system by external forceWhat is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V highest potential difference operating at 5000 rad/s . |

## Sketch complete free body force diagrams for each crateSketch complete free body force diagrams for each crate. A person with his ear to the ground sees a huge stone strike the concrete pavement a moment later 2 sounds are heard from an impact one travels in the air and the other in concrete. |

## Find out the frictional torque about the axleThe mass per unit length of the cord is 1.24 e-2 kg/m, so the mass of the cord is negligible compared to the mass of block. The cord is being vibrated at a frequency of 167 Hz (vibration source not shown in the drawing). |

## What is the frequency of the fourth overtoneA horizontal string of length 1.5 meters vibrates with a wave velocity of 1230 m/s at its fundamental frequency. |

## What is the force constant on the stringThe maximum speed of a 3.1kg mass attached to a string is 0.68 m/s and the maximum force exerted on the mass is 11N. What is amplitude of motion for the mass? What is the force constant on the string? What the frequency. |

## What is the mass of the block on the leftWhat is the mass of the block on the left. At what rate is the plate's area increasing when the radius is 50 cm? (Give your answer correct to 2 decimal places.) |

## What is the magnitude of the electric field in the membraneThe inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.077 V exists across the membrane. The thickness of the membrane is 8.1 x 10-9 m. What i.. |

## Time required by a rocketship to attain the speed of lightAssume a rocketship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. Estimate the time required by a rocketship to attain the speed of light and the distance travelled t.. |

## Boxes are transported from one location to anotherBoxes are transported from one location to another in the ware-house by means of a conveyor belt that moves with a constant speed of 0.50m/s. At a certain location the conveyor belt moves for 2.00 m up an incline that makes an angle of 10° with the h.. |

## Physics- speed of car at bottom of driveway initial speedPhysics: Speed of car at bottom of driveway; initial speed of bullet, 20 A 2.10 x 10³ kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20° with the horizontal. If an average friction force of 4.0 x 10³ N impedes the mo.. |

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