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An astronomer wishes to construct a telescope that will brighten point scourses by a factor of 16,900 times. If the human eye has an average diameter of about 0.5 cm what diameter should the telescope's primary lens/mirror be?
a 47.0 g golf ball is driven from the tee with an initial speed of 52.0 ms and rises to a height of 25.2 m.a neglect
if 60 of u.s. petroleum use goes for transportation and 1 of this goes for buses how much oil could be saved per year
To stretch a certain spring by 2.20 from its equilibrium position requires 7.00 of work. What is the force constant of this spring
A grating spectrometer is used to resolve third order peaks from two wavelengths of ?1 = 455.00 nm, What is the minimum number of slits this grating must have
What would the probable percent error inn1/n2 then be and what would the probable percent error be if the number of turns were 1.00±.01?
A light beam is incident on a piece of zircon (n = 1.923) at the Brewster's angle. Find the value of Brewster's angle
An electron moves in a uniform, horizontal 2.10-T magnetic field that is toward the west. Evaluate what is the direction of the minimal velocity
when a 420 gram mass is attached to a spring it oscillates with a period of 0.350 s. if instead a different mass m2 is
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 7.33 T, and the current in the solenoid is 2.20 x 102 A. What is the number of turns per ..
A flight attendant pulls her 71 N flight bag a distance of 322 m along a level airport floor at a constant velocity. The force she exerts is 36 N at an angle of 53° above the horizontal.
the same voltage is applied between the plates of two different capacitors. when used with capacitor a this voltage
A man pushes a 37 kg lawn mower using a handle inclined 30.0 degrees from the horizontal. He pushes with 80 N directed along the handle. What's the normal force on the mower
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