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A patient is going to be prescribed bifocals which will be 2.00 cm from the eye. The prescribed powers (in diopters) for the bifocals are +0.80 and -1.60, and these bifocals give the patient normal vision.
(a) Without the bifocals, what is the patient's near point?
(b) Without the bifocals, what is the patient's far point?
A 25-kg child is sitting on the seat of a swing 10 m long. Her father pulls the swing back until the swing makes an angle of 37 degrees with the vertical. The gain in potential energy of the child at this point is?
A pot containing 1.03 liters of water, initially at 19*C, How much heat must be supplied to bring it to a boil
A simple model of the Earth includes a dense spherical core of radius 4200 km and a less dense spherical shell of thickness 2180 km, determine the rotational kinetic energy of Earth
A constant voltage of5.00 V has been observed over a certain time interval across a 3.00H inductor. How long was this time interval
A small boat is moving at a velocity of 3.35 m/s while it is accelerated by a river current perpendicular to the initial direction of motion. If current acceleration is 0.750 m/s^2, what will the new velocity of the boat be after 33.5 s.
At their closest approach, Venus & Earth are 4.20 x 10^10m apart. The mass of Venus is 4.87 x 10^24 kg, What is the force exerted by Venus on Earth
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates. the magnitude of the field is 2x10^4N/C. What is the verticle deflection d of the el..
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
High-speed photos of a 200?g flea jumping vertically show that the jump lasts 1.5ms and involves an average vertical acceleration of 110 g, What's the change in the flea's momentum during its jump
When four people with a combinedmass of 340kg sit down in a car, they findthat the car drops 0.50cm lower on its springs, What is the frequency of the car's vibration if its mass (when it is empty) is 2.0 x 103 kg
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
Consider a charged metallic spherical shell or radius a = 1.75 cm. Calculat the potential on the surface of the shell
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