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When a patient is being fitted with contact lenses, thecurvature of the patient's cornea is measured with an instrumentknown as a keratometer. A lighted object is held near the eye, andthe keratometer measures the magnification of the image formed byreflection from the front of the cornea. If an object is held11.0 cm in front of a patient's eye,and the ratio of the height of the reflected image to that of theobject is 0.027, what is the radius of curvature of the patient's cornea?
________? mm
A grating has 530 rulings/mm and is 5.4 mm wide. How many higher orders of maxima can be seen
a large plane having uniform charge density has an electric field just outside the plane that points directly toward
A diffraction grating with 2.507 X 10^3 lines/cm is used to examine the sodium spectrum. a) calculate the angular separation of the two closely spaced yellow lines of sodium (588.485 nm and 589.067 nm) in the first order. Answer in units of degree..
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. What is the speed of the lighter car just after collision
A car of mass m = 1365 kg is pushed off a cliff of height h = 29 m. what was the kinetic energy of the car the instant after it left the cliff
You place a 4.47-mm-high diamond on the axis of and 11.3 cm from a lens with focal length -6.79 cm. How high is the image
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 96.3 m. How tall is the antenna
The highest-energy photons emitted by a hydrogen atom have an energy of 13.6 eV. Find the energy, in joules, of one of these photons
A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90?, so that the normal becomes pe..
A swing is made from a rope that will tolerate a maximum tension of8.00*102 N without breaking. Initially, the swing hangsvertically. The swing is then pulled back at an angle of60.0o with respect to the vertical and released fromrest. What is the ..
The Moon is 3476 km in diameter and orbits the Earth at an average distance of 384,400 km. What is the angular size in radians of the Moon as seen from Earth
Assume Rutherford used an alpha particle with a kinetic energy of 5.25MeV and fired them into a sheet of aluminum, one atom thick. Determine the minimum radius of approach
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