Physicians use electroencephalograms (EEGs) to study electrical oscillations in the human brain. So-called beta oscillations, whose enhancement has been linked to alcoholism, have frequencies from 12 to 30 Hz . What's the corresponding range in periods? Tmin? Tmax?

Mounted at angle of 35 degrees on a frictionless incline : A spring is mounted at angle of 35 degrees on a frictionless incline. The spring is compressed by 15 cm where it is allowed to propel a mass of 5.5 kg up the incline. a. if the spring constant is 550 N/m, how fast is the mass moving when it leaves th.. |

Object lies between the focal point and the mirror : A concave mirror has a focal length of 25.8 cm. The distance between an object and its image is 51.4 cm. Find (a) the object and (b) image distances, assuming that the object lies beyond the center of curvature and (c) the object and (d) image distan.. |

Find the mass of the second projectile : A 14kg projectile is launched at 380m/s at a 55 (degrees) angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140m/s . The two stick together and land 9.8km ho.. |

Finish listening to your favorite compact disc : As you finish listening to your favorite compact disc (CD), the CD in the player slows down to a stop. Assume that the CD spins down with a constant angular acceleration. Part A If the CD rotates clockwise (let's take clockwise rotation as positiv.. |

Study electrical oscillations in the human brain : Physicians use electroencephalograms (EEGs) to study electrical oscillations in the human brain. So-called beta oscillations, whose enhancement has been linked to alcoholism, have frequencies from 12 to 30 Hz . What's the corresponding range in perio.. |

What is the magnitude of the change in its momentum : A 1870 kg truck traveling north at 37 km/h turns east and accelerates to 52 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum? |

Magnitude of the larger of the two resistances : When a 42.0-V emf device is placed across two resistors in series, a current of 12.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 62.0 A. Wh.. |

Two masses are connected by a string : Two masses are connected by a string which goes over an ideal pulley. Block A has a mass of 4.75kg and can slide along the smooth plane inclined by 37.0 degrees above the horizontal. The masses remain stationary. a) draw a free body diagram b) what m.. |

What is the resistance of the bulb-current in the bulb : A 100 W lightbulb is plugged into a standard 120 V outlet. How much does it cost per month (30 days) to leave the light turned on continuosly? Assume electrical energy costs 7.5/kWh. (Enter dollars with no unit) What is the resistance of the bulb? Wh.. |

## Find resistive force does the wood exert on the bulletA rifle with a barrel length of 65 cm fires a 9 g bullet with a horizontal speed of 380 m/s. find resistive force does the wood exert on the bullet |

## Determine how long the train blocked the crossingA train 350 m long is moving on a straight track with a speed of 84.8 km/h. determine how long the train blocked the crossing |

## Compute the magnification of the microscopeA compound microscope in which the objective and eyepiece are 30.2 cm apart uses an objective lens with fobj = 1.0 cm, What is the magnification of the microscope |

## Determine a point where the electric field is zeroAn electron is at the origin, and an ion with charge +5 e is at x=16 nm. Find a point where the electric field is zero |

## Calculate the moment of inertia of a baseball batAssume the bat is a wooden rod of uniform diameter and take the pivot point to be in the middle of the bat, at the end of the bat, Calculate the moment of inertia of a baseball bat |

## How much force is required to cause this deflectionInside a computer mouse, a delicate spring (k = 8.5 N/m) deflects a distance of 3 mm. How much force is required to cause this deflection |

## Determine the magnetic torque on the coilA circular coil of wire of 200 turns and diameter 2.0 cm carries a current of 4.0 A. What is the magnetic torque on the coil |

## A block of ice on a smooth horizontal floorA dockworker applies a constant horizontal force of 89.0N to a block of ice on a smooth horizontal floor |

## How long does it take door to rotate through the same angleTwo doors of the same unknown dimension lay inline and parallel horizontally to one another (Example: As viewed from above in an architectural drawing. |

## Calculate many electrons are transferredI put a material on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground. |

## By what factor does it change the currentA transformer has 683 turns in its primary winding and 109 in its secondary winding. Assuming it has 100 percent efficiency, By what factor does it change the current |

## What do superstring theories try to elucidateA conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine.. |

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