Mathematics

Mathematics, 04.10.2019 22:50, mirza326

The part of a bridge pier out of the water is three times the length of the part under water. if the height of the pier above water is 30 feet, what is the length of the part under water?

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Biology, 21.07.2019 12:00, atsuedem974

Science > > > > miriam notices when she goes to the beach that sometimes the water rises as high as the pier. at other times of the day, the water barely covers the pillars under the pier. these differences in water level are primarily due to the gravitational influence of which of the following? 1) comets 2) asteroids 3) the moon 4) the sun orographic precipitation occurs due to air masses being lifted to higher altitudes by 1) the density difference of air masses 2) the presence of mountain barriers 3) a frontal action 4) extratropical cyclones radiocarbon dating is a useful technique for all samples below except 1) shells 2) bone 3) granite 4) wood

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Physics, 12.09.2019 19:30, josephmcintosh3137

The force exerted on a bridge pier in a river is to be tested in a 1: 10 scale model using water as the working fluid. in the prototype the depth of water is 2.0 m, the velocity of flow is 1.5 m/s and the width of the river is 20 m. if the hydrodynamic force on the model bridge pier is 5 n, what would it be on the prototype? (hint: pressure ratio is equal to the length-scale ratio) (5 points; ans: 5000 n)

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Physics, 13.09.2019 00:30, aek02

G"the force exerted on a bridge pier in a river" is to be tested in a 1: 10 scale model using water as the working fluid. in the prototype the depth of water is 2.0 m, the velocity of flow is 1.5 m/s and the width of the river is 20 m. of the hydrodynamic force on the model bridge pier is 5 n, what would it be on the prototype? (hint: pressure ratio is equal to the length-scale ratio) (5 points; ans: 5000 n)

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