A lighthouse sweeps its beam of light around in a circle
A lighthouse sweeps its beam of light around in a circle once every 7.5 s. To an observer in a spaceship moving away from Earth, the beam of light completes one full circle every 15 s. What is the speed of the spacecraft relative to Earth?
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a cylindrical storage tank has a radius of 108 m when full to a height of 307 m it holds 15500 kg of a liquid
light shines during a single slit whose width is 860 10-4 m a diffraction pattern is formed on a flat screen located 40
neutron stars consist only of neutrons and have unbelievably high densities a typical mass and radius for a neutron
a glass bottle of soda is sealed by a screw cap the absolute pressure of the carbon dioxide inside the bottle is 160
a lighthouse sweeps its beam of light around in a circle once every 75 s to an observer in a spaceship moving away from
a microscope by a tube length of 200 achieves a total magnification of with a objective and a eyepiece the microscope
a flight attendant pulls her 700 n flights bag a distance of251 m along a level airport floor at a constant speed the
a certain car requires 240x106 j of thermal energy to operate its engine while traveling a distance of 100 km gasoline
a flat bi-metallic strip consists of alluminium riveted to a strip of iron when heated the strip will bend which metal
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