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An oxygen atom at a particular site within a DNA molecule can be made to execute simple harmonic motion when illuminated by infrared light. The oxygen atom is bound with a speing-like chemical bond to a phosphorous atom is bound which is rigidly attached to the DNA backbone. The oscillation of the oxygen atom occurs with frequency ƒ=3.7 x 1013 Hz. If the oxygen atom at this site is chemically reoplaced with a sulfur atom, the spring constant of the bond is unchanged (sulfur is just below oxygen in the Period Table). Predict the frequency for a DNA molecule after the sulfur substition
A wind turbine is initially spinning at fix angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.162 rad/s2. Evaluate the initial angular velocity of the turbine
A ball is dropped from rest at the top of a 480 meter tall building. What is the total time that the ball takes to reach the ground
002 10.0 points A plane designed for vertical takeoff has a mass of 7.1 × 103 kg. Find the net work done on the plane
A 0.120-kg, 50.0-cm-long uniform bar has a small 0.055-kg mass glued to its left end and a small 0.110-kg mass glued to the other end. How far from the left end should the fulcrum be placed
To predict, sketch and test acceleration vs. time kinematics graphs - To review predicting and sketching distance vs. time and velocity vs. time kinematics graphs
A physics student stands on the edge of a tall building 50.0m high. She throws a ball with a speed of 20.0m/s at an angle of 38.0 degrees above the horizon. how far from the edge of the building (what x) does the ball hit the ground
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
The same potential difference is applied across two wires. wire A carries half the current of wire B. If the resistance of wire B is r, what is the resistance of wire A
A car is traveling down around a banked curve in the road. Thecurve has a radius of 300 m and is banked at an angle of10.0o. (a) At what speed is no friction required?
A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, but the number of protons Z in the nucleus is unknown. Obtain the next-to-the-longest wavelength in the series of lines
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 2.37 cm from the rotation axis
A glass sheet is covered by a very thin opaque coating. In the middle of this sheet there is a thin scratch 1.25×10-3mm thick. The sheet is totally immersed beneath the surface of a liquid.
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