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A uniform ladder of length 10 m and mass 6 kg is resting against a vertical wall making an angle of 37? with the ground. The vertical wall is frictionless but the ground is rough with µs = 0.75. An electrician weighing W kg climbs up the ladder to a point 8 m from the lower end, measured along the length of the ladder. Calculate the maximum weight Wmax of the electrician who can work from this without the ladder setup collapsing.
A pipe is open at both ends. Its length is 22.81 cm. If I excite standing waves in the pipe by blowing air over one of its ends, Find the distance between the antinodes at the two ends of the pipe
Flying due east, the plane flies with the rotation of the Earth, while flying due west, it flies against the rotation. Will the flight times be the same? Different? Why?
The lens-to-retina distance of a woman is 1.98 cm, and the relaxed power of her eye is 52.0 D. What is her far point
A ball on a string is being whirled in a horizontal circle at constant speed. The circle has a radius of 30 centimeter. The ball completes one revolution every 0.84 s. Find the angular momentum per unit mass of the ball
A block rides on a piston that is moving vertically with simple harmonic motion. If the SHM has period 4.7 s, at what amplitude of motion will the block and piston separate
A projectile is launched at ground level with an initial speed of47.5 m/s at an angle of 25.0°above the horizontal. It strikes a target above the ground 2.60 seconds later. What are the x and y distances from where the projectile was launched to w..
An 9.5 g ice cube at -10°C is put intoa Thermos flask containing 200cm3 of water at 20°C. Byhow much has the entropy of the cube-water system changed whenequilibrium is reached? The specific heat of ice is 2220J/kg·K.
The picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection plates. what field magnitude is necessary to deflect the beam to the side of the screen
a rod 16.0 cm long is uniformly charged and has a total charge of -21.0 microc. determine the magnitude and direction
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. What is the acceleration of the jet in m/s2
A speedboat moving at 35.0 m/s approaches a no-wake buoy marker 100 m a head. The pilot slows the boat by a constant acceleration of-3.90 m/s2 by reducing the throttle? How long does it take the boat to reach the buoy?
Severe weather ice makers hail is produced in severe thunderstorms when an updraft draws moist surface air into subfreezing air above 10,000 feet.
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