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Ordinary glasses are worn in front of the eye and usually 2.00cm in front of the eyeball. A certain person can see distant objects well, but his near point is 60.0cm from his eyes instead of the usual 25.0cm . Suppose that this person needs ordinary glasses What focal length lenses are needed to correct his vision ? What is their power in diopters?
Your 70kg friend is standing on the outer edge of a merry go round with moment of inertia 695kg*m^2, what will be the new angular velocity
A mass m1 = 15.0 kg and a mass m2 = 11.5 kg are suspended by a pulley that has a radius of 10.2 cm and a mass of 3 kg, determine the tension in the left cord
The figure shows the light intensity on a screen behind a double slit. The slit spacing is 0.20 mm, What is the distance from the slits to the screen
A solid, rectangular iron bar measures .40cm by 1.0cm by 30cm. Find the resistance between each of the three pairs of opposing faces, assume the faces in question are quipotentials.
A high-energy pulsed laser emits a 1.0-ns-longpulse of average power 1.7×1011W . The beam is nearly a cylinder 2.5×10?3m in radius and it travels in free space. Determine the energy delivered in each pulse.
You need to push a box across the room. which side of the box should be the side down on the floor
An engineer wishes to determine the spring constant of a helical spring. She first puts enough weights on the spring to pull the coils apart. What is the best estimate of the spring constant
A 200-g mass resting on a horizontal frictionless surface is attached to a spring of spring constant 35 N/m. What is the angular frequency of the oscillations
Suppose that the resistance of such a resistance thermometer is 105? when its temperature is 17.2 °C. The wire is then immersed in a liquid, What is the temperature of the liquid
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
A virtual image is formed 22.0 cm from a concave mirror having a radius of curvature of 30.5 cm. compute the position of the object
A 1.00-kg glider attached to a spring with a force constant 16.0 N/m oscillates on a frictionless, horizontal air track. Find the period of the glider's motion
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