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A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center. The disk has mass md = 3.4 kg and radius R = 0.26 m. The rods each have mass mr = 1.3 kg and length L = 0.72 m.
1) What is the moment of inertia of the whole ceiling fan?
2) What is the final rotational energy of the fan?
3) Now the fan is turned to a lower setting where it ends with half of its rotational energy as before. The time it takes to slow to this new speed is also t = 3.5 s.
What is the final angular speed of the fan?
4) What is the magnitude of the angular acceleration while the fan slows down?
Suppose that the resistance of such a resistance thermometer is 105? when its temperature is 17.2 °C. The wire is then immersed in a liquid, What is the temperature of the liquid
Total internal reflection will occur when the refraction angle is 90' degrees or more. find the angle of incidence at which total interanl refraction in water will occur
You are trying to lose weight by working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, What is the magnitude of the force that you exert on the handle
One mole of an ideal gas does 1408 J of work on the surroundings as it expands isother- mally to a final pressure of 1.6 atm and vol- ume of 29L. Find out the initial volume.
An electrically charged particle having a mass of 4.50*10-24 kgis placed in an electric external field and released from rest. What is the net force that acts on the first microsecond
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
What is the charge on each sphere if the two charges are alike?
A piece of cheese with a mass of 1.30kg is placed on a vertical spring of negligible mass and a force constant k= 1600 N/m that is compressed by a distance of 16.2cm. how high does the cheese rise from this initial position
A bird flies 3.05 km due west and then 3.26 km due north. Another bird flies 1.03 km due west and 1.16 km due north. Determine the angle with respect to the 2nd bird's displacement vector
A refrigerator shelf is an array of parallel wires with uniform spacing of 10.50 cm between centers. Find the number of diffracted beams leaving the other side of the shelf
A 130kg astronaut (including space suit) acquires a speed of 2.55m/s by pushing off with his legs from a 2000kg space capsule. What is the change in speed of the space capsule
An open-tube mercury manometer is used to measure the pressure in an oxygen tank. The atmospheric pressure is 1020mbar .1 bar = 105 N/m2. Determine the absolute pressure (in Pa) in the tank
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