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A molecule of DNA (deoxyribonucleic acid) is 2.09 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 1.08% upon becoming charged. Determine the effective spring constant of the molecule.
Two plates separated by a distance 18.3 mm are charged to a potential difference of 7.25 volts, Using the concept of work-energy, calculate the change in kinetic energy
A trombone has an effective length of 160 cm and the speed of sound in air is 345 m/s. Notes are selected by moving a U-shaped tube in or out to change effective length of the trombone.
A converging lens of focal length 7.550cm is 20.5cm to the left of a diverging lens of focal length -6.50cm, Find the magnification of the coins final image
An initially motionless test car is accelerated uniformly to 1.20 × 102 km/h in 8.68 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.455 seconds, after which the car is measured to be traveling at 65.5 km/h..
A very thin sheet of plastic (n=1.65) covers one slit of a double-slit apparatus illuminated by 640nm light. What is the (minimum) thickness of the plastic
A pair of speakers separated by 0.900 m is driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers. (Assume the spe..
What is constant acceleration
The speed of a longitudinal wave in a mixture of helium and neon at 300k was found to be 758m/s. what is the composition of the mixture
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.30m long and 1.50m high. How many seconds elapsed on your watch when she saw 22.0s pass on hers
What is the magnitude of the accelerations of the masses, What is the magnitude of the accelerations of the masses
A motorcycle starts with a constant acceleration of 3.0 m/s^2. At just that instant a buick with a constant speed of 20 m/s passes the motorcycle, How fast is the motorcycle travelling when it overtakes the buick
why circular orbit of the particle encloses a magnetic flux.
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