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A helicopter, starting at rest, accelerates straight upfrom the roof of a hospital. The lifting forces does work inraising the helicopter. An 810-kg helicopter rises from rest to aspeed of 7.0 m/s in a time of 3.5s. During this time it climbs to aheight of 8.2m. What is the average power generated by the lifting force?
In a mass spectrometer, a singly, negative charged ion having a particular velocity selected by using a magnetic field of .10 T perpendicular to an electric field of 1000 V/m. What is the mass of the ion
a whistle of frequency 527 hz moves in a circle of radius 60.3 cm at an angular speed of 12.3 rads. what are a the
a capacitor consists of two closely spaced metal conductors of large area separated by a thin insulating foil. it has a
A series RCL circuit is comprised of a 3.00-mH inductor and a 5.00-µF capacitor. What is the resonant frequency of this circuit
In one type of computer keyboard, each key holds a small metal plate that serves as one plate of a parallel-plate, air-filled capacitor. Calculate the capacitance before the key is depressed
A high-energy pulsed laser emits a 1.0-ns-long pulse of average power 3.4 *10^11 W. The beam is 2.1*10^-3 m in radius. Determine the energy delivered in each pulse
a parallel plate capacitor is made of two 10cm x 10cm plates spaced 1 cm apart. they are charged with a -1nc. an
A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal. How many forces act on the crate
We have studied diffraction from a single slit, where light is sent through a thin opening. how thick was this strand of hair
A ball is thrown from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = 7.1i + 6.8j, What will be the total horizontal distance traveled by the ball
David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.80 m/s^2 at the instant when David passes.
A 1500 microfarad capacitor and a 5600 microfarad capacitor are connected in parallel across a 12.0 V potential difference. Determine the total energy stored in the capacitors
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