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The near point of a naked eye is 30 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.062 rad. A magnifying glass has a focal length of 17 cm, and is held next to the eye. The enlarged image that is seen is located 57 cm from the magnifying glass. Decide the angular size of the image.
When a65.0-V emf device is placed across two resistors in series, a current of 10.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is56.0A. What ..
Gravitational Field. The gravitation field produced by an object is defined as the gravitational force that the object exerts on a small test particle of mass m divided by m.
For light that originates within a liquid and strikes the liquid/air interface, What is Brewster's angle for this light
A bacterium (mass = 2.26 x 10?15 kg) in the blood is moving at 0.389 m/s. What is the de Broglie wavelength of this bacterium
A person can change the volume of his body by taking air into his lungs. The amount of change can be determined by weighing the person under water. Find the change in body volume
A 1300-kg car moving on a horizontal surface has speed v = 55km/h when it strikes a horizontal coiled spring, What is the spring stiffness constant of the spring
A thin film of oil (n = 1.29) is located on smooth, wet pavement. What is the minimum thickness of the oil film
A draw bridge of length L is being held up by an axel at its pivot and by a chail that is also of length L. The drawbridge has uniform mass. What is the minimum angle to shoot an arrow
An astronomical telescope uses an objective power +2.00 D. If the length of the telescope is 52 cm, what is the focal length of the eyepiece
A rope attached to a 15.0kg wood sled pulls the sled up a 20.0 degree snow-covered hill. If the tension in the rope steadily increases, at what value of the tension does the box slip
a rowboat crosses a river with a velocity of 3.95 mih at an angle 62.5deg north of west relative to the water. the
A wheeled cart with a mass of 0.50 kg is rolling along a horizontal track at a constant velocity of 2.0 m/s, What is the maximum compression of the spring
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