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In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.39 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of θ above the horizontal, it loses contact by the wall of the cylinder and falls onto the clothes below. How many revolutions per second should the cylinder make in order that the clothes lose contact by the wall when θ = 71.0°?
A camera with a telephoto lens of focal length 125 nm is used to take a photograph of a plant 1.8 m tall. The plant is 5.0 m from the lens. How tall is the image
Two objects moving with a speed vtravel in opposite directions in a straight line. The objects stick together when they collide, and move with a speed of v/5 after the collision.
Write an expression for the electric field vector of a uniform plane wave in free space that is propagating in the direction given by a line from the origin to the point (3,0,4), Compute the irradiance of this wave
an ideal monatomic gas is the working substance of a carnot engine. during the isothermal expansion the volume doubles.
The mean diameters of X and Y, two planets in the same solar system, are 6.4 103 km and 1.2 104 km, respectively. The mass of X is 0.25 times the mass of Y. The value of g on Y is 8.8 m/s2.
a square thin conducting sheet that has 6.60-m-long edges has a net charge of 61.0nbspnbspmicroc. the square is in
A garden hose with a diameter of 0.63 meter has water flowing in it with a speed of 1.5 m/s and a pressureof1.3 atmospheres. Estimate what is the pressure in the nozzle
Bob can throw a 460 g rock with a speed of 32 m/s. What is Bob's maximum power output as he throws the rock in kW
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 16.4 rad/s. What is the angular speed of the wheel
A 61 kg boy and a 42 kg girl use an elastic rope while engagedin a tug-a-war on a frictionless icy surface. If theacceleration of the girl toward the boy is 2.7 m/s2, determine the magnitude of the acceleration of the boy toward thegirl
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80kg. A person pushes on the outer edge of one section with a force of F = 72N that is directed perpendicular to the section. Find out..
A soccer ball is kicked with an initial speed of 27m/s at an angle of 23 degrees with respect to the horizon. Find the maximum height reached by the ball
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