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A 2.4-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of the mass/ spring system is 1.3 J. What is the elastic potential energy of the system when the 2.4-kg block is replaced by a 4.5-kg block?
As a bat flies toward a wall at a speed of5.70m/s , What frequency does the bat hear in the reflected wave
A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. estimate the volume of the cell
Photons of wavelength 530 nm are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc, compute the work function of the metal
The primary windings of a transformer, which has an 65% efficiency, are connected to 110 V ac. Calculate the current through the primary windings of the transformer
A space station consists of two donut-shaped living chambers, Aand B, that have the radii shown in the figure. As the stationrotates, an astronaut in chamber A is moved 1.48 x 102 malong a circular arc. How far along a circular arc is an astronautin ..
The super ball is not replaced by a clay ball the same size and mass. The ball is dropped from the same height and it sticks to the table. Calcluate the impulse exerted on the clay ball
Calculate the Work required (in eV) to move a stationary electron from the location r3 to r5 in a hydrogen atom
a bucket of water of mass 14.7 is suspended by a rope wrapped around a windlass, that is a solid cylinder with diameter 0.280m with mass 11.6 kg. with what speed does the bucket strike the water
a telephoto camera lens with focal length f 300 mm and a maximum aperture f2.8 takes a picture of two red 630 nm led
A venturi meter is a device for measuring the speed of a fluid within a pipe. A gas flowing at a speed v2 through a horizontal section of pipe whose cross-sectional area A2 = 0.0700 m2. The gas has a density of ? = 1.20 kg/m3.
A toy top has a string wrapped around its body. The string has a length of 64cm and is wrapped around the top at a place where its radius is 2.0cm. What is the final angular velocity in rpm of the top when the string is completely unwound
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
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