A helicopter of mass 1.40×103kg1.40×103kg is descending vertically at 3.00 m/sm/s. The pilot increases the upward thrust provided by the main rotor so that the vertical speed decreases to 0.450 m/sm/s as the helicopter descends 3.00 mm. What is the initial energy of the helicopter?
Answers: 1
Physics, 22.06.2019 04:30, AShevel6767
In a system, when potential energy decreases, then entropy also decreases. true false
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Physics, 22.06.2019 06:30, itzyoboyCj
Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane
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Physics, 22.06.2019 14:30, gus2006santos
Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.
Answers: 2
Physics, 22.06.2019 18:00, jeff2852
Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative
Answers: 3
A helicopter of mass 1.40×103kg1.40×103kg is descending vertically at 3.00 m/sm/s. The pilot increas...
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