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A molecule of DNA (deoxyribonucleic acid) is 2.06 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.91% upon becoming charged. Decide the effective spring constant of the molecule? N/m
A steady current of 1.5 A flows through a 3600 ohm resistor for 2 seconds. How many charges are flowing at any point in the wire during the 2 seconds
A father racing his son has three-fifths the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s, What is the original speed of the father
a large point charge of q 50 microc creates an electric field and an electric potential all around it. a styrofoam
A ball is thrown vertically upward with a speed of 12.0 m/s. How long does it take to reach its highest point
The occupant of a small vechical hears a frequency of 1.5x10^3 Hz emitted from a stationary space buoy, What is the speed of sound on the planet
An unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus
A wire carries a current of 26.4 Amp. Find the magnitude of the magnetic field 4.72 meter away from the wire
Oppositely charged parallel plates are separated by 5.30 mm. A potential difference of 600 V exists between the plates. What is the magnitude of the electric field between the plates
In a popular amusement park ride, a rotating cylinder of radius R = 3.10 m is set in rotation at an angular speed of 4.20 rad/s, as in the figure shown below. The floor then drops away, leaving the riders suspended against the wall in a vertical posi..
A 12.3-kg monkey is hanging by one arm from a branch and swinging on a vertical circle. compute the magnitude of the tension in the monkey's arm
A 1.7kg , 20-cm-diameter turntable rotates at 50rpm on frictionless bearings, What is the turntable's angular velocity, in rpm, just after this event
A diffraction grating has 3560 lines/cm. Light that contains all wavelengths between 476 and 633 nm shines on the grating. Find the width of dark area between first and second order spectra
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