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A ball is thrown straight upward. At above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain?
A 150 g mass hangs from a fishing line. If it falls and accelerates at 4.0 m/s^2, what is the tension in the fishing line
A 240-V dc motor has an armature whose resistance is 1.10? . When running at its operating speed, it draws a current of 16.0A, What is the back emf of the motor when it is operating normally
a student with a mass of 80.0 kg runs up three flights of stairs in 12 s. the student has gone a vertical distance of 8.0 m. what is the student's power
The net force on the object is not zero in Tubby's frame, but there is an inertial frame in which net force is zero.
An archer shoots an arrow with a velocity of 46.0 m/s at an angle of 45.5° with the horizontal. What is the initial speed of the apple
a 200 loop square coil 0.8m to a side lies in the xy plane. The current in each loop of the coil is 8A clockwise. find the torque on the coil due to the magnetic field
A flower pot fell of a windowsill and falls past the window below. you may ignore air resistance. it takes the pot .470s to pass the window, which is 1.80m hight. how far is the top of window below the windowsill from w/c the flower pot fell.
Find the thermal efficiency and the specific work of a simple Rankine cycle if the maxium temperature and pressure are 1050oC and 5.0 MPa and the minimum pressure is 20 kPa.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided. Do this on paper. Your ins..
A whale swims due east for a distance of 1.5 km, turns around and goes due west for 5.7 km, and finally turns around again and heads 4.5 km due east. What is the total distance traveled by the whale
Illustrate what tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 19.0^circ with the vertical?
How much heat flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 24°C water in reaching equilibrium, What is the change in entropy due to this heat transfer
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