A 10 kg door that is 1.0m wide and 2.5m tall is supported by two hinges,each of which is 10 cm from the top(or bottom)of the door. If each hing supports half the weight of the door, what is the force on each hinge? Remember,force is a vector?

Compute the wavelength of the incident photon : In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.4° from a free electron that is initially at rest. Calculate the wavelength of the incident photon |

Evaluate the molar mass of the unknown compound : When a 41.7g sample of an unknown compound is dissolved in 500g of benzene, the freezing point of the resulting solution is 3.77oC. The freezing point of pure benzene is 5.48oC, and Kf for benzene is 5.12oC/m. Calculate the molar mass of the unkno.. |

Obtain the final equilibrium temperature of lead and water : A 234.0 g piece of lead is heated to 86.0oC and then dropped into a calorimeter containing 611.0 g of water that initally is at 24.0oC. find the final equilibrium temperature (in oC) of the lead and water |

Define how many moles of urea must be dissolved : How many moles of urea (60g/mol) must be dissolved in 71.6g of water to give a 2.4m solution |

Compute what is the force on each hinge : A 10 kg door that is 1.0m wide and 2.5m tall is supported by two hinges,each of which is 10 cm from the top(or bottom)of the door. what is the force on each hinge |

Find how high must the person climb : A 73.6 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 514 (food) Calories. How high must the person climb |

Explain what is the value of q with water vaporizes : What is the value of q when 7.12g of water vaporizes at 373oK? The enthalpy of condensation of water at 373oK is -40.7KJ/mol. |

Determine the gauge pressure of the water guns reservoir : A hand-pumped water gun is held level at a height of 0.61 m above the ground and fired. Find the gauge pressure of the water gun's reservoir at the instant when the gun is fired |

Define the highest vapor pressure at room temperature : You are given the following boiling point data: Which of the liquids would you expect to have the highest vapor pressure at room temperature |

## What is the speed of the body after the collisionA projectile of 1.04-kg mass approaches a stationary body of 5.24 kg at 15.0 m/s, What is the speed of the 5.24-kg body after the collision |

## Find the peaks elevationWhen driving west toward the Rocky Mountains, you see a peak 2.8^\circ above the horizon. Your GPS gives your current elevation as 1460m, Find the peak's elevation |

## How much electric power is delivered to the lightbulbA 3.0-V battery with an internal resistance of 2.5 Ω is connected to a lightbulb of a resistance of 6.0 Ω. How much electric power is delivered to the lightbulb |

## What is the speed of the sack at impactA farmer throws a sack of wheat vertically downward with an initial speed of 12 m/s from the roof of a mill, 30.0 m above the ground. What is the speed of the sack at impact |

## Determine the temperature of the liquidThe length of the mercury column at the ice point and steam point are 5.0 cm and 40.0cm respectively. What is the temperature of the liquid |

## What is length of the semi major axis of the asteroids orbitAn asteroid is seen in opposition from Earth once every 1000 days. What is the sidereal orbital period of the asteroid? What is the length of the semi major axis of the asteroids orbit? |

## What is the rotational speed of the recordA horizontal vinyl record of mass 0.10kg and radius 0.10 m rotates freely about a vertical axis through its center with a rotational speed of 5.10 rad/s. |

## A ball rolls off a platform that is 7 meters above thea ball rolls off a platform that is 7 meters above the ground. the balls horizontal velocity as it leaves the platform |

## Calculate the linear density of this stringThe equation of a transverse wave on a string is y = (6.1 mm) sin[(30 m-1)x + (300 s-1)t] The tension in the string is 42 N. Find the linear density of this string |

## Determine how far apart are heather and jillHeather in her Corvette accelerates at the rate of (3.20i - 2.00j) m/s2, while Jill in her Jaguar accelerates at (1.00i + 3.20j) m/s2. How far apart are Heather and Jill |

## What are the charge on each electrodeTwo 11-cm-diameter electrodes 0.54cm apart form a parallel-plate capacitor. What are the charge on each electrode, the electric field strength inside the capacitor |

## What is the fundamental frequency of this wireThe two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have witho.. |

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