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A study was done observing the ability of the eye to rapidly rotate in order to follow a moving object by placing contact lenses that contain accelerometers on a subject's eye. The eyeball has radius 1.25 cm. Suppose that, while the subject watches a moving object, the eyeball rotates through 30.0° in a time interval of 75 ms. (a) What is the magnitude of the average angular velocity of the eye? (b) Assume that the eye starts at rest, rotates with a constant angular acceleration during the first half of the interval, then the rotation slows with a constant angular acceleration during the second half until it comes to rest. What is the magnitude of the angular acceleration of the eye? (c) What tangential acceleration would the contact-lens accelerometers record in this case?
a total of 4.27middot106 electrons are placed on an initially uncharged wire of length 3.41 m. what is the magnitude of
A heat engine converts 100.0 cal from a supply of 400.0 cal into work. How much mechanical work was done?
A square of paper measuring a on a side carries a total charge +q which is uniformly distributed over its surface. The square lies in the x-y plane with its center at the origin and its sides parallel to the coordinate axes. Find the electric fiel..
A satellite is in orbit about Earth. Its orbital radius is1.28×107 m. The mass of the satellite is 2849 kg and the mass of Earth is 5.979×1024 kg. Determine the orbital speed of the satellite in mi/s. 1 mi/s = 1609 m/s.
What is the magnitude of the friction force that the floor exerts on the ladder?
The electron density on the surface of a circular disc of radius 20 m is given as ne = 300ρ cos2 φ electrons/meter2. Determine the number of electrons residing on the surface of the disc. What is the total charge on the disc?
The parallel plates in a capacitor, with a plate area of 5.80 cm2 and an air-filled separation of 4.90 mm, are charged by a 8.10 V battery. They are then disconnected from the battery and pulled apart (without discharge) to a separation of 6.70 mm..
a tube of length l is closed at one end. a stretched wire is placed near the open end. the wire has a length l and has
A battery with an emf of 11.1 Volt and internal resistance of 1.02 ohms carries a positive current of 0.550 Amp from its negative terminal to its positive terminal. Determine at what rate is chemical energy used
Ten percent of the power in a harmonic voltage/current wave is reflected from the interface between a coaxial cable of characteristic impedance 100 Omega and a second transmission line. Find the possible characteristic impedances of the second tr..
The fire dept needs water to flow out of the hoses even when they're at a height of five stories 15m. What is the minimum pressure needed
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
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