A 700lbf prefabricated slab is being lifted up by a crane at a constant velocity. The crane pulls on the slab with a force of 4000N at an angle of 20o to the left of vertically upward. The only other force acting on the slab is the force of air resistance. What is the magnitude of the force of the air resistance? What is the direction of the force of the air resistance?

## Determine the resistance of its heating elementA well-insulated electric water heater warms 113 kg of water from 20.0° C to 51.0° C in 33.0 min. Find the resistance of its heating element |

## Compute the specific gravity of a liquidCompute the specific gravity of a liquid given the following information: m = 53.00 ± 0.05 grams, mA = 33.50 ± 0.05 grams, mL = 42.50 ± 0.05 grams |

## How much work is finished by gravityThe acoustical system is driven by speaker emitting a 432Hz note. If destructive interference occurs at a particular instant, by what least amount amount must the difference of two path lengths in the U-shaped tube be increased so as to hear const.. |

## Find its angular velocity just before it started upA yo-yo has a mass of 0.604 kilogram, a moment of inertia of 0.01 kgm2, and a string that is 0.592 meter in length. find its angular velocity just before it started up |

## Calculate how fast are the waves travelingA fisherman notices that wave crests pass the bow of his anchored boat every 2.84 second. Determine how fast are the waves traveling |

## Determine the magnitude of the net torqueUsing the elbow joint as the axis of rotation, determine the magnitude of the net torque acting about the elbow due to the forearm, hand, and ball |

## Determine the maximum distance between viewer and celebrityA celebrity holds a press conference, which is televised live. A television viewer hears the sound picked up by the microphone directly in front of the celebrity. find the maximum distance between television viewer and celebrity |

## What was the magnitude of the applied horizontal forceWhile rearranging a dorm room, a student does 400 J of work in moving a desk 2.0 m. What was the magnitude of the applied horizontal force |

## What is the power of the pumpWater is pumped steadily out of a flooded basement at a speed of 5.1 m/s through a uniform hose of radius 0.5 cm. What is the power of the pump |

## Calculate the total mechanical energy of the boxA box starts out at the top of a frictionless ramp, then slides down. The ramp has a heighth=3meters and a slope of5degrees with respect to the ground. What is the total mechanical energy of the box at the top of the ramp |

## What is the maximum torque on a moleculeWhat is the maximum torque on a molecule of HCl (dipole moment p = 3.60 × 10-30 Cm) in a region of electric field E = 3.0 × 104 N/C |

## What is the speed of the rivers currentA boat, whose speed in still water is 1.70 m/s, must cross a 260m wide river and arrive at a point 110m upstream form where it starts. What is the speed of the river's current |

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