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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 railroad car with a mass of 11600 kg collides and couples with a second car of mass 18600 kg that is initially at rest. what is the final velocity of the two railroad cars after they couple
A proton is passing through a uniform, 0.500-T magnetic field and is directed along the x axis. find the pitch of the helix
The distance between the objective and eyepiece lenses in a microscope is 24cm, What eyepiece focal length will give the microscope an overall angular magnification of 350
A train 389 m long is moving on a straight track with a speed of 40.6 m/s. The engineer applies the brakes at a crossing, find how long (in s) the train blocked the crossing
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. how fast is the student going at the bottom of the slide
A 2.70 bucket is attached to a disk-shaped pulley of radius 0.121 and mass 0.842 . If the bucket is allowed to fall. What is the angular acceleration of the pulley
When the plunger is pushed, contents of the syringe are forced throughout a hollow needle (also of circular cross-If a 4.0 N force is applied to plunger and diameters of the plunger and the needle are 1.20 cm and 2.50 mm, correspondingly, what force ..
Calculate the Q value in MeV for the double Beta decay of 128Te (atomic mass 127.904461 a.m.u.) to 128Xe (atomic mass 127.903531 a.m.u.).
A 95g ball of clay traveling at speed v0 hits and sticks to a 1.9kg kg block sitting at rest on a frictionless surface. What percentage of the ball's initial energy is "lost"
A capillary tube with a closed end is place into water.
An electron entered a parallel-plate capacitor with the speed 5x10^5 m/s horizontally. What is the distance traveled by the electron along its initial direction between the capacitor plates
The tangential speed of a particle on a rotating wheel is 3.5m/s. how long will the particle take to make one revolution
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