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For the eye we can model the lens as a speherical refractor. The image distance is set by the length of the retina (Si=1.8 cm) Find the focal length of the eye for an object .65 m away from the eye. Given the index for refraction of the lens of 1.38 find the radius of the lens for this configuration.
Two satellites, A and B, are in different circular orbits about the earth. Find the ratio (TA/TB) of the periods of the satellites
Suppose a sphere, thin hoop, and a disk were all rolling along a horizontal surface with the same speed, Which would roll up the hill the farthest
A rescue helicopter lifts a 91.2-kg person straight up by means of a cable. What is the tension in the cable
A wire has a resistance of 15.9. It is melted down, and from the similar volume of metal a new wire is made that is 3 times longer than the original wire. Evaluate what is the resistance of the new wire
Spider man steps form the top of a large building. He falls freely from rest to the ground a distance of h. Find what is the height of the building
a frictionless pendulum of length 3 m swings with an amplitude of10 degrees. What is the kinetic energy of the pendulum whenits potential energy is 5 J
A thin rod has a length of 0.292 m and rotates in a circle on a frictionless tabletop. The axis is perpendicular to the length of the rod at one of its ends. what is the change in the angular velocity of the rod
Bronco Brown is mowing his lawn. He applies a force F along the handle of the lawnmower as shown. Bronco moves the mower at constant velocity. What is the magnitude of the resistance force acting horizontally on the mower
A passenger on a Ferris wheel moves in a vertical circle of radius R=2.0 m with a constant speed v. Draw a free-body diagram, and find the upward force the seat applied to her at the top of the circle
A blackbody will emit less energy at higher frequencies.
A 1100 kg car carrying four 75 kg people travels over a "washboard" dirt road with corrugations 3.5 m apart. by how much does the car body rise on its suspension
You have a parallel plate capacitor with circular plates of radius 1 cm. The distance between these plates is 4 cm, what would the new distance between the plates be
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