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In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius=0.32m). The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle? Above the horizontal, it loses contact with the wall of the cylinder and falls onto the clothes below. How many revolutions per second must the cylinder make in order that the clothes lose contact by the wall when? = 70°?
Use the Bohr model to calculate the wavelength λ of the photon emitted when the electron in a hydrogen atom falls from the n = 5 level
A hot-air balloonist, rising vertically with a constant velocity of magnitude v= 5.00 m/s, releases a sandbag at an instant when the balloon is a height h= 40.0 m above the ground. Compute the position of the sandbag at a time 1.50 s after its rele..
Water flows through a fire hose of diameter 7.09 cm at a rate of 1.2 x10-2 m3/s. What is the velocity with which the water exits the hose
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.6 cubic meters of sea water. What is the buoyant force acting on the object
a 1cm high object is placed 20cm to the left of a converging lens f(focal length)=10cm. where is the final image and how high is it
A 1500-kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered by the engine
An initially motionless test car is accelerated uniformly to 145 km/h in 8.28 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.455 seconds, after which the car is measured to be traveling at 60.0 km/h.
At which angle will the photon scatter with respect to its original direction? (The accepted unit abbreviations for angles are either 'deg' for degrees or 'rad' for radians.)
a mercury thermometer is constructed as shown. the capillary tube has a diameter of 0.0025 cm and the bulb has a
After performing an experiment concerning charging a capacitor Sally noticed that the potential difference across the capacitor reached 2/3 of its final value after 18 seconds. find the time constant for the resistor-capacitor combination
An electromagnetic wave of wavelength 405 is traveling in vacuum in the direction. The electric field has amplitude 2.20×10?3, What is the frequency of this wave
The construction of a flat rectangular roof(2.7 m x 4.6 m) allows it to withstand a maximum net outward forceof 20008 N. At what wind speed will this roof blow outward
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