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A) A person struggles to read by holding a book at arm's length, a distance of 70 cm away. What power of reading glasses should be prescribed for her, assuming they will be placed 2.0 cm from the eye and she wants to read at the "normal" near point of 25 cm?
B) What is the focal length of a magnifying glass of 3.3 × magnification for a relaxed normal eye?
C) How far from a converging lens with a focal length of 36 cm should an object be placed to produce a real image which is the same size as the object?
A beam of length L is attached to a string as shown in picture. The mass of the beam is M=20kg. Determine the tension in the string and the force on the beam exerted by the pivot point.
What was the arrow's initial speed. A small sphere with a mass of 2.00×10^-3g and carrying the charge of 4.80×10^-8C hangs from a thread near a very large, charged insulating sheet. The charge density on the sheet is -2.90×10^-9C/m^2 .
questionone of ways that a forensic scientist can figure out the make and model of a car from a ldquohit and runrdquo
A 4.5 cement block is blocking a prime parking spot at school. Lauren and Katie lift the block 0.9 m and then carry the block 2.7 m out of the way. Calculate the work done by the 2 girls and calculate the work done by the force of gravity
A car starts from rest and travels for 5.0 s with a uniform acceleration of +2.3 m/s2. How fast is the car going at the end of the braking period
Canadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, Obtain how long will it take the bird to cover a ground distance of 450 kilometer from north to south
A student is running her top speed of 4.8m/s to catch a bus, which is stopped at the bus stop. how fast is the bus traveling
If the magnitude of the drift velocity of free electrons in a copper wire is 6.28 10-4 m/s, what is the electric field in the conductor
In famous magician trick. The magician lies on bed of nails and a sledge hammer is used to pound on an anvil on her chest. The nails will not pierce her skin. Explain why?
A point charge q = +40.0 μC moves from A to B separated by a distance d = 0.180 m in the presence of an external electric field E of magnitude 275 N/C directed toward the right as in Figure below.
How would the results change if the angle of the third load in second experiment increased?
a glass windowpane in a home is 0.62 cm thick and has dimensions of 0.8 m 1.9 m. on a certain day the indoor
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