Physics, 07.10.2019 23:20 natalie3734
Firemen are shooting a stream of water at a burning buildingusing a high-pressure hose that shoots out the water with a speedof 25.0 m/s. as it leaves the end of the hose. once it leaves thehose, the water moves in projectile motion. the firemen adjust theangle of elevation α of the hose until the water takes3.00 s to reach the building 45.0 m away. you can ignore airresistance; assume that the end of the hose is at grounglevel.
a) find the angle of elevation α
b) find the speed and acceleration of the water at the highestpoint in its trajectory
c) how high above the ground does the water strike thebuilding, and how fast is it moving just before it hits thebuilding?
Answers: 1
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Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
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Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost
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