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A 1.4 m long glass tube that isclosed at one end is weighted and lowered to the bottom of afreshwater lake. When the tube is recovered, an indicator markshows that water rose to within 0.39 mof the closed end. Determine the depth of the lake. Assume constant temperature.
m
When the plane atats to accelerate for take off, a man is holding the pocket watch steady by its 20cm chain, Estimate the takeoff velocity of the plane
A uniform electric field of magnitude 4.10 × 105 N/C points in the positive x direction, Find the change in electric potential energy
A house painter is standing on a uniform, horizontal platform that is held in equilibrium by two cables attached to supports on the roof. How large is the force exerted by the right-hand cable
A charge q is distributed uniformly around a thin ring of radius r, What is the magnitude of the magnetic moment of the rotating charge
Piano tuners tune pianos by listening to the beats between the harmonics of two different strings. When properly tuned, the note A should have a frequency of 440 Hz and the note E should be at 659 Hz.
As you bounce a tennis ball of mass 7.70 10-2 kg off a wall, its velocity changes from vx = 10.8 m/s to vx = -8.3 m/s. Find the impulse applied to the ball
A roller coaster reaches the top of the steepest hill with a speed of 4.0 km/h. Estimate its speed when it reaches the bottom
A 125 object is taken to a height of 400 above the Earth's surface. What is the object's mass at this height? What is the object's weight at this height
A particle has a charge of +2.3 ?C and moves from point A to point B, a distance of 0.13 m. The particle experiences a constant electric force, and its motion is along the line of action of the force.
An object is moving with a constant velocity V1=2i+4j for 5 seconds. It then moves with a constant velocity of V2=-3i=2j for 10 seconds, determine the final velocity vector
A hydraulic lift is used to jack a 970 kg car 12 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N. What is the area of the input piston
A wheel is rotating about an axis that is in the z-direction. The angular velocity is at , increases linearly with time and is at . We have taken counterclockwise rotation to be positive.
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