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A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. The refractive power of a magnifying glass that has an angular magnification of 6.0 when the image of the stamp is located at the near point is 20 dioptres.
a) What is the angular magnification when the image of the stamp is 41 cm from the eye?
An Olympic basketball player shoots towards a basket that is 5.36m horizontally from her and 3.05m above the floor. The ball leaves her hand 1.83m above the floor at an angle of 45.0o above the horizontal. What initial speed must she give the ball so..
X- rays are created in a standard x-ray tube by accelerating electron across a potential difference of V and having the electrons collide with a metal target to eject x-ray. when the wavelength of the x-ray is measured using Bragg diffraction from..
two large parallel metal plates are 6.5 cm apart and have charges of equal magnitudes but opposite signs on their
a pen contains a spring with a spring constant of 228 nm. when the tip of the pen is in its retracted position the
a 5000 african elephant has a resting metabolic rate of 2500 . on a hot day the elephants environment is likely to be
A weightlifter lifts 200 kg from the floor to a height of 2 m in 2 s. How much work did the weightlifter perform
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
question what mass of solid cao is needed to remove the sulfur dioxide from 1.0 106 m3 of air having an so2
A rider on a motorcycle that hass a mass of 195 kg is traveling with a speed of 24 m/s. What is the approximate total rational kinetic energy of the wheels
machine part rotates at an angular speed of 0.46 rad/s; its speed is then increased to 2.0 rad/s at an angular acceleration of 0.59 rad/s2
a 2.0 kg mass is hanging from a spring. when it is in equilibrium the spring is stretched 3.0 cm pasts its zero
Two identical capacitors are connected in parallel to an acgenerator that has a frequency of 740 Hz and produces a voltage of39 V. What is the capacitance of each capacitor
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