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The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain (with the eye focused at the far point). The near point of the person using the microscope is 25 cm and the far point is at infinity. What is the final overall magnification of the microscope?
An elastic cord is 66 cm long when a weight of 66 N hangs from it but is 86 cm long when a weight of 76 N hangs from it. What is the "spring" constant k of the elastic cord.
Direction of the surface winds What is the expected composition
The velocity graph of a car accelerating from rest to a speed of 60 km/h over a period of 30 seconds is shown. Approximation the distance, d travelled throughout this period.
What is work done by the non-conservative force
A steel cable with total length 20 m and mass 100 kg is connected to two poles. The tension in the cable is 2,000 N, and the wind makes the cable vibrate with a frequency of 2 Hz. compute the wavelength of the resulting wave on the cable.
Find the modulation index corresponding to the given trapezoidal pattern for the AM signal.
Calculate the amount of work (in electron-volts) it would take to move an electron from 11.6 to 13.4 away from a +3.50 point charge.
Nichrome wire of cross-sectional radius 0.782 mm is to be used in winding a heating coil, find the length of wire you must use to wind the coil
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
n a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.6 ? 10-17 N during the first 1.9 cm of the tube's length, Find the speed of the electrons when they hit the screen
A baseball is bunted down the third-base line leaving the bat from a height of 0.850m with an initial velocity of 4.00m/s at an angle of 37.87° above horizontal.
A loudspeaker of mass 19.00 is suspended the distance of = 1.80 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.50. What is the tension in each of the cables.
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