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You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.2 cm. You have a helium-neon laser (landa= 633 nm) and a 0.13 mm-diameter pinhole. How far behind the pinhole should you place the viewing screen?
a 22.0uc point charge lies at the origin. find the electric field at the point 1.25 m 0.85m . express your answers
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.65 cm apart. Determine the time interval the electron spends between the plates
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.5
a steam pipe is covered with 1.50 cm thick insulating material of thermal conductivity .2000 calcm degress c s. how
A quarterback takes the ball from the line of scrimmage, runs backwards for 13.0 yards, What is the magnitude of the football's resultant displacement
A 40-g block of ice is cooled to ?72°C and is then added to 640 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter.
A meter rule is balanced at the 70 cm mark by placing a 200 g mass at the 80 cm mark. What is the mass of the ruler
A car approaches the top of a hill that is shaped like a vertical circle with a radius of 51.6 m. What is the fastest speed that the car can go over the hill
A current of 15 A flows through an electric heater operating on 120 V. What is the heater's resistance? Compute the power consumption of the electric heater in kW? How much energy does it use in 600 min(10hrs)?
the total electric flux from a cubical box 3.00cm on a side is 1.40times103ncdot m2c. what charge is enclosed by the
1 a notebook computer wire carries 1.5 a. how many electrons pass through the wire each second? 2 a 50-w and 100-w
A gem-quality diamond has a small flaw located 1 mm directly below one face. How far below the face does this flaw appear to an observer
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