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Physics, 21.06.2019 20:30
When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m
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Physics, 21.06.2019 22:30
An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)
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Physics, 22.06.2019 16:30
In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic
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Physics, 22.06.2019 18:00
Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?
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Acell phone company relies on which kind of waves in order to provide service for its customers?...
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