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A spring with force constant 327 N/m is in a compressed state, 0.401 m shorter than its relaxed length. In this condition, the spring serves a vital purpose in a device for detecting impending earthquakes. A curious physicist releases the spring and, moreover, stretches it until it is 0.143 m longer than its relaxed length.
That renders the earthquake detector useless, and it fails to warn of a very strong earthquake that subsequently shatters all the lawn sculptures in the area-fortunately with no other damage or injury. Although some might consider this to be beneficial, the physicist's boss does not. She had some extremely unattractive plaster gnomes around her yard and loved them dearly. So she imposes a punishment on the physicist and requires him to calculate the change of elastic potential energy that he caused by his meddling. What does he find?
A model airplane with mass 0.757 kg is tethered to the ground by a wire so that it flies in a horizontal circle 29.7 m in radius. The airplane engine provides a net thrust of 0.798 N perpendicular to the tethering wire.
Give the center of mass for a water molecule. The distancebetween a hydrogen atom and the oxygen atom is .91 angstroms andthe angle between the two O-H bonds is 105o
Calculate the rate of heat conduction through house walls that are 13.0cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors.
A roughly spherical astroid whose radius is 40 km rotates once every 2.4 hours. What is it's angular speed in milliradians/sec
Prepare a 1,050- to 1,400-word paper in which you evaluate the organizing function of management as it relates to at least two of the following organizational resources:
a solonoid 4.0 cm in raduis and 4 m in length has 5000 uniformly spaced turns and carries a current of 5.0a. concider a
In the drawing the head-up display is designed so that the distance between the digital readout device and virtual image 1 is 1.60 m. Find the focal length of the concave mirror
A baseball is thrown from the roof of a 22.0 m tall building with an initial velocity of mag 12.0 m/s and directed at an angle of 53.1 degrees above the horizontal. (a) What is the speed of the ball just before it strikes the ground?
A supermassive black hole passes through the edge of the solar system 1.20 x 10^13 m away. What is the mass of the black hole
A hollow spherical shell with mass 1.80kg rolls without slipping down a slope that makes an angle of 40.0? with the horizontal. Find the magnitude of the frictional force acting on the spherical shell
An electromagnetic wave in a vacuum has a maximum magnetic field amplitude of 5.67×10?7 T. find the maximum electric field amplitude of the wave
At t = 0, a particle leaves the origin with the velocity of 9 m/ s in the positively direction and moves in the x y plane with a constant acceleration of (2.0i - 4.0j) m/ s2. At the instant the x coordinate of the particle is 15m, what is the spee..
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