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A woman can read the large print in a newspaper only when it is at a distance of 65 cm or more from her eyes.
(a) Is she nearsighted (myopic) or farsighted (hyperopic), and what kind of lens is used in her glasses to correct her eyesight?
(b) What should be the refractive power (in diopters) of her glasses (worn 2.7 cm from the eyes), so she can read the newspaper at a distance of 20 cm from the eyes?
Given an isothermal expansion of gas from 1.0 to 2.0 cubic meters in a piston-cylinder arrangement where pressure varies according to P= 1.2 atm -.062 atm/ m^3 V, How much work was done by the gas
A crate of mass 150.0 kg lies at rest on a horizontal storage room floor. The coefficient of static friction between crate and floor is 0.72, and the coefficient of kinetic friction is 0.85. (You may suppose g = 10.0m/s2).
A rifle with a barrel length of 62 cm fires a 12 g bullet with a horizontal speed of 460 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm.
Three forces are applied to a tree sapling, to stabilize it. If F1= 282 N and F2= 355 N, find F3 in magnitude and direction. The angle between F1 and F2 is equivalent to 110 degrees.
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated power numerically, to the nearest 10 W
A series of equipotential lines are shown right. Points A- D are shown, An electron travels from A to B, and then to C, and then to D. What is the work done on the electron by the field, as measured in eV
A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical. Neglecting friction, find out the child's speed (m/s) at the lowest position to two decimal places. Use 9,8 m/s..
7.84 g of argon gas at an initial pressure of 4.34 atm and at 16°C undergo an isobaric expansion until the volume has increased in five times. What is the volume of the gas after expansion
A massless frictionless pulley, an ideal string, and two masses (m1 = 2.50 kg and m2 = 4.00 kg) are connected together, What is the magnitude of the tension force in the string
Suppose a star with radius 8.62 108 m has a peak wavelength of 681 nm in the spectrum of its emitted radiation. What is the surface temperature of the star
A series RLC circuit has components with the following values: L = 22.0 mH, C = 86.0 nF, R = 25.0 ?, and ?Vmax = 100 V, with ?v = ?Vmax sin ?t. Find the resonant frequency of the circuit.
Old naval ships fired 13 kg cannon balls from a 210 kg cannon. It was very important to stop the recoil of the cannon, since otherwise the heavy cannon would go careening across the deck of the ship.
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