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A meniscus lens is concave on one side and convex on the other.
a) For a contact (meniscus) lens, the inner surface is curved to fit the eye with radius 7.8 mm. The lens with n=1.56 needs to have a focal length of 44.4 cm. What should be the curvature radius of the outer surface?
b) If the person using this lens can now clearly see objects as close as 20 cm, what is this person's near point?
assume the mass of the object remains constant. a if the kinetic energy of an object changes by 13 by what factor has
A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 574 Hz and has a speedof 24.0 m/s. What frequency does the motorcyclist hear
An aluminum wire having a cross-sectional area equal to 5.10 10-6 m2 carries a current of 3.50 A. Find the drift speed of the electrons in the wire
question a car starts from rest and moves around a circular track of radius 30.0 m. its speed increases at the constant
An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30.0? with the horizontal. The object slides along the inclined plane
Determine the minimal frequency of the force we can measure with this system if the maximal allowed amplitude error is 5%.
The square loop (with side length 2m) is perpendicular to a 3T magnetic field. Determine the average current induced in the loop and the average power dissipated by the 10 ohm resistor.
Calculate the capacitance of the device. What potential difference between the spheres results in a 4.00 µC charge on the capacitor?
a block of mass 6kg slides on a horizontal plane against a constant resistance of 12.6 n. a light inextensible string
an object in equilibrium has three forces exerted on it. a 18-n force acts at 90deg and a 62-n force acts at 61deg.
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 720 N person climb before the ladder begins to slip?
An object is placed 22 cm from a certain mirror. The image is half the size of the object, inverted, and real. A How far is the image from the mirror? Express your answer using two significant figures.
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