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A person is having trouble seeing. Bifocals must be prescribed for him. His far point is 78.0 cm, and his near point is 57.0 cm. What two lenses (with power in dioptres) must be prescribed to enable him to see clearly from a comfortable reading distance of 25.0 cm to infinity?
Discuss the postulates and implications of Albert Einstein's Special Theory of Relativity on the way that scientific data is collected and analyzed
A rocket starts from rest and moves upward from the surface of the earth, What is the speed of the rocket when it is 340m above the surface of the earth
q. a ballistic pendulum consists of a chunk of clay suspended from a rope. while a bullet is fired into clay it sticks
In an experiment on standing waves, a mechanical vibrator drives a string. Both ends of the string are fixed. The distance between the fixed ends is 80.0 cm. how much mass is hanging over the pulley
A wheel that is rotating at 45 Rad/s is give an angular acceleration of 3 Rad/s (sqrd). Use gravity: 10 m/s, how long is the angular velocity of the wheel
A fan is running at 898 rpm when the power goes out. It makes 1,311 complete revolutions before it finally stops. What was the angular acceleration
Three identical stars of mass 7.46 ×1024 kg are located at the vertices of an equilateral triangle with side 7500 km. At what speed should they move if they all revolve under the influence of one another's gravitational force in a circular orbit circ..
a charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.5 cm giving
When the temperature of a coin is raised by 87.8 C°, the coin's diameter increases by 2.14 x 10-5 m. If the original diameter is 1.75 x 10-2 m, Discover the coefficient of linear expansion.
If an R = 1.0-kW resistor, a C = 1.0-mF capacitor, and an L = 0.20-H inductor are connected in series with a V = 150 sin (377t) volts source, what is the maximum current delivered by the source?
Two astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. Theythen push each other apart. How far apart are they
a solid wood door 1.04 m wide is hung in a metal door way at 0.0degc with a clearance of 2.2 mm on the side. if the
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