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Antwan raised a 12.0-N physics book from a table 75 cm above the floor to a shelf 2.15 m above the floor. What was the change in the potential energy of the system?
q. a a diamond is underwater. a light ray enters one face of the diamond and after that travels at an angle of 30
A telescope for astronomy view has an objective lens 180[mm] diameter with focal length 2000[mm], What magnifications does each provide
A hoop and a disk, both of 0.70- m radius and 5.0- kg mass, are released from the top of an inclined plane 3.0 m high and 8.2 m long. What is the speed of the hoop
Light passes from air into a substance. The angle of refraction is 22degrees and angle of incidence is 30 degrees. Compute the polarizing angle for this substance. Name a substance that has this index of refraction.
A 245 ball is tied to a string. It is pulled to an angle of 5.20 and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 10.5.
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 570nm
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 9:42. find the rms output voltage of the transformer
helium atoms emit light at several wavelengths. light from a helium lamp illuminates a diffraction grating and is
An electron moving along the x axis has a position given by x = 20te-4t m, where t is in seconds. How far is the electron from the origin when it momentarily stops
Two converging lenses having focal lengths of 12.0 cm and 22.0 cm are placed 50 cm apart, as shown in the figure below. The final image is to be located between the lenses, at the position indicated.
a rectangular loop of resistance r 0.001 ohms measuring x 0.15 m by y 0.07 m is projected with velocity v 6.2 ms
At some automobile toll-collecting stations, the thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the reason of this wire.
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