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A molecule of DNA (deoxyribonucleic acid) is 2.04 µm long. The ends of the moleculebecome singly ionized: negative on one end, positive on the other.The helical molecule acts like a spring and compresses 1.13% upon becomingcharged. Determine the effective spring constant of the molecule.
An aluminum cylinder is suspended in an unknown fluid by a spring scale. Outside the fluid, the object weighs 20N. In the fluid,
A Nordic jumper goes off a ski jump at an angle of 9.8° below the horizontal, traveling 108 mhorizontally and 64.3 m vertically beforelanding. (a) Ignoring friction and aerodynamic effects, calculate the speed needed by the skier on leaving the ra..
Two parallel plates, each of area 8.17 cm2, are separated by 6.20 mm, Calculate the amount of the electric charge stored on each plate
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air, that the patient and platform start from rest, determine the recoil velocity
you have three 3.0 uf micro farads capacitors. two of the capacitors are in parallel and this parallel combination is
A 150kg uniform board 8m long is supported by two posts: one 1m from the left and the other 2m from the right. Find the forces on the supports
One of the 1000 kg car moves west at 40 m/s , while the second moves east from the same starting point at a constant velocity of 30 m/s. What is the momentum
compute how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
question an asteroid of mass 59000 kg carrying a negative charge of 12.0 muc is 170 m from a second asteroid of mass
q1. consider the gas consisting of a large number of non-interacting particles in which energy of each particle can
A bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that the pendulum ..
A block slides down a frictionless ramp of height 0.37 meters. How far will the block travel from the base of the ramp before the velocity reaches 2.3 m/s
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