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Question: An optical disk drive in your computer can spin a disk at up to 10,000 rpm. If a particular disk is spun at 7570 rpm while it is being read, and then is allowed to come to rest over 0.502 seconds, what is the magnitude of the average angular acceleration of the disk?
A ten pound car wheel has a moment of inertia of 0.38 kg m2. While rotating at a constant speed the wheel makes 35.64 revolutions in 5.5 s
A pitcher throws a fastball horizontally at a speed of 140 km/h toward home plate, 18.4 m away. (a) If the batter's combined reaction and swing times total 0.350 s, how long (in seconds) can the batter watch the ball after it has left the pitcher's h..
Given an ordinary cylindrical glass with a volume of one half liter and filled completely to the top with water at room temperature (20C), What would be the vapor pressure for this fluid
After a tornado, a 0.50-g drinking straw was found embedded 4.5 cm in a tree. What was the straw's speed
A radioactive isotope has an activity of 8.09 mCi. After 3.05 hours the activity is 6.31 mCi. What is the half-life of the isotope?
A vertical tube 1.9 cm in diameter and open at the top contains 7.6 g of oil (density 0.82 g/cm^3 floating on 7.6g of water. Find the gauge pressure at the oil-water interface
Blanche, a 100 kg shot-putter, is putting the 4 kg shot in a track meet. Just before she releases the shot, Blanche is in the air. What is Blanche's horizontal acceleration at this instant
A 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s "burn." what impulse is experienced by the rocket sled
A car is traveling at 44.0 km/h on a flat highway. What is the stopping distance when the surface is dry
An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 1.26 eV. What is the width of the square well
A plucked guitar string produces a sound wave of frequency 440 Hz. (a) What is the wavelength of the sound wave (assume the speed of sound in air is 340 m/s)? (b) How much time elapses between the impacts of two adjacent compression on your eardru..
A series RLC circuit is driven by an alternating source at a frequency of 410 Hz and an emf amplitude of 90.0 V. What is the rms potential difference across the resistor
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