A duck flying horizontally due north at 14.2 m/s passes over Atlanta, where the magnetic field of the Earth is 5.09×10-5 T in a direction 55.9° below a horizontal line running north and south. The duck has a positive charge of 3.28×10-8 C. What is the magnetic force acting on the duck?

What is the period of oscillation of the pebble : A hole is drilled straight through the center of the planet Foosbane. The planet is remarkable in that its density is constant, independent of depth, what is the period of oscillation of the pebble |

Explain how the nails do not penetrate into my body : In one of my demonstrations, I let someone break concrete blocks that are placed on top of me while I am sandwiched between two beds of nails. explain how the nails do not penetrate into my body |

Explain how many h+ ions are eliminated per week : Human urine has a normal pH of 6.2. If a person eliminates an average of 1226 mL of urine per day, how many H+ ions are eliminated per week |

State water has a higher boiling point than either hf or nh3 : List the following substances in order of increasing normal boiling points, explaining your reasoning: NO, NH3, Ne, and RbCl. Explain why water has a higher boiling point than either HF or NH3 |

What is the magnetic force acting on the duck : A duck flying horizontally due north at 14.2 m/s passes over Atlanta, where the magnetic field of the Earth is 5.09×10-5 T in a direction 55.9° below a horizontal line running north and south. The duck has a positive charge of 3.28×10-8 C. What is th.. |

What is the coefficient of restitution for this collision : A 2.0 kg object moving with a velocity of +8.0 m/s collides with a 8.0 kg object that is initially at rest. What is the coefficient of restitution for this collision |

Find the tension of the string which supports hanging mass : A 2 kg mass is held at rest on top of a frictionless and horizontal table. find the tension of the string which supports the hanging mass |

Evaluate the density of the polonium metal : Polonium metal crystallizes in a lattice which contains only one Po atom per cubic unit cell. The radius of polonium atom is 1.67 A. Calculate the density of the polonium metal |

Explain what is the ph of 0.069 m codeine hydrochloride : Codeine (C18H21NO3) is a narcotic pain reliever that forms a salt with HCl. What is the pH of 0.069 M codeine hydrochloride (pKb of codeine is 5.80) |

## What is the force applied to the plungerA syringe has a plunger that has a radius of 0.5 cm. A 2 cm long needle is attached. The opening in this needle has a radius of 0.2 mm. What is the force applied to the plunger |

## How much entropy did the gas emitn = 3.60 mol of Hydrogen gas is initially at T = 340 K temperature and pi = 3.32×105 Pa pressure, How much entropy did the gas emit |

## What is the frequency of the alternating currentA light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the frequency of the alternating current |

## Crew member removed the protective earplugsA member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 360. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 91 dB. What would the sound intensit.. |

## Find out the speed of the combination after collisionA 4.00-kg model rocket is launched, expelling 54.9 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after fuel has burned. |

## Find the magnitude of a magnetic and electric fieldhow do I find the magnitude of a magnetic and electric field at a certain time (The Erms and Brms are given as well as the period and intensity? What is the equation? |

## Determine the length of one side of the coilA generator has a square coil consisting of 580 turns. The coil rotates at 51 rad/s in a 0.28 T magnetic field. What is the length of one side of the coil |

## What is the pressure difference between inlet and outletThe intake in the figure has cross-sectional area of 0.79 m2 and water flow at 0.44 m/s. What is the pressure difference between inlet and outlet |

## Calculate the average power output on the way upA car is traveling at a constant speed of 38.8m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has constant acceleration. What acceleration must it.. |

## Calculate the shells velocity when it leaves the mortara 2.50 kg firework shell is fired straight up from a mortar and reaches a height of 110 m. Neglecting air resistance, calculate the shell's velocity when it leaves the mortar |

## Find the tension in the hitchA car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car |

## Find the mass of the astronautIn order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut |

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