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A molecule of DNA is 2.17 micrometers (10^-6 meters)long. The ends of the molecule become singly ionized -negative on one end, positive on the other. The helicalmolecule acts like a spring and compresses 1.00% upon becomingcharged. Determine the effective spring constant.
The electric field has been measured to be vertically upward everywhere on the surface of a box 20 cm long, 4 cm high, and 3 cm deep, What is the amount of charge enclosed by the box
The distance from the earth to the center of our galaxy is about 23000ly(1yr is 9.47x10^15m), as measured by an earth based observer. how long will it take to make the trip
why does d account for the reduction of the distance from 8.5 km to a 0 distance. Is this not a reflection of displacement rather than just distance
Suppose a projectile is to be fired from the floor onto a table 1.1 meters high that stands 92 centimeters from the point at which it is fired
The temperature of a black body is increased by 10.5 percents. By how many percents did the wavelength of the peak change
A force F acts on a 10kg object at rest for 3s and changes its velocity to 6m/s. What is the change in momentum of the object, What is the impulse of the force on the car
Three point charges are arranged along the x axis. Charge q1= = -4.50nC is located at x=.25m and charge q2=3.00nC is at x=-0.330m. a positive charge q3 is located at origin. What must the value of q3 be for the net force on this point charge to hav..
questiona known toy consists of an aligned row of identical steel balls that are suspended bynbspmono?lament so they
The Canadian Norman Wells Oil Pipeline extends from Norman Wells, Northwest Territories, to Zama, Alberta. What is the volume of oil in the pipeline if it is full at some instant in time
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hypergravity") on test pilots and astronauts. How fast must the astronaut's head be moving to experience this maximum acceleration
A jet with mass m = 50000.0 kg jet accelerates down the runway for takeoff at 1.7 m/s2. What is the net horizontal force on the airplane as it levels off
At the end of a wild roller-coaster ride, the train of cars must come to a graceful stop at the loading station. What is the magnitude of the acceleration of the train
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