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The protein dynein powers the flagella that propel some unicellular organism. biophysicists have found that dynein is intrinsically oscillatory and that it exerts peak forces of about 1.0 pN when it attaches to structures called microtubules. thee resulting oscillation have amplitude 15 nm. (a) if the system is to be modeled as a mass spring system, what's the associated spring constant? (b) if the oscillation frequency is 70 Hz, what's the effective mass?
A wood block floats on water with 35% of its volume above the surface (of water), what is the average density of the block (in kg/m3)
A 5.0-uF capacitor is charged so that the voltage drop across its plates is 5.0V. A 10.0-uFcapcitor is similarly charged so that the voltage drop across its plates is 10.0V. The two charged capacitors are then connected to each other in parallel w..
The drum of the photocopying machine in the problem above has a length of 48 cm and a diameter of 9 cm. What is the total charge on the drum
Calculate the longest three wavelengths and the series limit for the Paschen (n2 = 3) and the Brackett (n2 = 4) series, and plot both series on the same linear scale.
After inverting the tube 100 times, the temperature of the lead shot is found to have increased by 30C
A laser peripheral iridotomy is a procedure for treating an eye condition known as narrow-angle glaucoma, in which pressure buildup in the eye can lead to loss of vision. How many photons does the laser deliver
Two pith balls are each suspended on two strings of equal length of 9.5cm from the same point. How many electrons were removed from each pith ball
White light is incident at 45 degrees from air onto a 60-60-60 prism in which red light has n=1.500 and violet has n=1.600. Find the total deviation of each and the dispersion
A 50 turn coil of wire has an area of 0.33 m2. A uniform magnetic field of 0.80 T points in a direction that is perpendicular to the plane of the wire. What is the average value of the induced voltage during the time the magnetic field reversed dir..
Two identical, small insulating balls are suspended by separate 0.23-m threads that are attached to a common point on the ceiling. Determine the charge on each ball
Unless otherwise stated, all objects are located near the Earth's surface, where g = 9.80 m/s2. find the coefficient of kinetic friction between the ice and the puck
During liftoff, a hot-air balloon accelerates upward at a rate of 3.4 . The balloonist drops an object over the side of the gondola when the speed is 17, How long does it take to hit the ground
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