Q1. A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until the cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed?

Q2. If she is served 240 of coffee at 84 in a well-insulated container, how much ice at 0 must she add to obtain a final temperature of 30?

Q3. If the weight of a room full of water is so great, why don't the first floors of houses built over basements all collapse as flooded to the ceiling?

What are the strengths and weaknesses : What are the strengths and weaknesses of the measure of welfare used by many economists: consumer welfare plus producer surplus. |

Find out the magnitude and direction of the field : A proton moves perpendicular to a uniform magnetic field, B, at 1.6 multiplied by 107 m/s and experiences an acceleration of 1.8 multiplied by 1013 m/s2 in the positive x direction while its velocity is in the positive z direction. Find out the magni.. |

The degrees of freedom : Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table... |

Stabilize aggregate demand : If instead the Fed wants to stabilize aggregate demand, how should it change the money supply.. |

The gravitational potential energy of the ball changed : If the weight of a room full of water is so great, why don't the first floors of houses built over basements all collapse as flooded to the ceiling. |

Value of gold if people discovered : What would happen to the value of gold if people discovered that it could easily be made at home from inexpensive materials |

Assume the charge on black hole : Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V. |

Current antipoverty policy : You are asked whether current antipoverty policy meets three generally accepted goals of helping, minimizing cost, preserving work incentives also what changes you would favor and why. |

Demand curve expressions : Based on the information conveyed by the demand curve expressions, how would you explain the price difference between the two meals. |

## What is magnitude of the runners total displacementWhat is magnitude of the runners total displacement |

## What is the frequency heard by the observerA train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer . |

## What must be the temperature of the cold reservoirWhat must be the temperature of the cold reservoir in order to increase the efficiency to 29.0% |

## How various missions will be possible in one yearEvery day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 0.85 percent of this energy to accelerate spaceships, then how various missions will be possible in one year. |

## What is magnitude of the ducks velocityDetermine magnitude of the force from the ground on each front wheel. what is magnitude of the duck's velocity. |

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