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The extremes of the ultraviolet portion of the electromagnetic spectrum range from ? 1.0 10-7 m to ? 1.0 10-9 m. Find the minimum accelerating voltages required to produce wavelengths at these two extremes.
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.10 cross 103 m3 to a volume of 1.17 cross 103 m3. how much does the helium's internal energy increase
A diverging lens has a focal length of 15.0cm . For each of two objects located to the left of the lens, determine Wether the image is erect or inverted
a woman can read the large print in a newspaper only when it is at a distance of57 cmor more from her eyes.a is she
A 2 kg mass is released from rest at the top of a plane inclined at20 degrees above the horizontal. The coefficient of kineticfriction between the mass and the plane is 0.20. What will be the speed of the mass after sliding 4 m along the plane?
A typical adult human lung contains about 270 million tiny cavities called alveoli. Estimate theaverage diameter of a single alveolus. Assume the alveoli arespherical and a typical human lung is about 2.05 liters.
A recording engineer works in a soundproofed room that is 39.4 dB quieter than the outside. what is the intensity outside
An object with a charge of 0.880 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
You attach a meter stick to an oak tree, such that the top of the meter stick is 2.47 meters above the ground. how high above the ground was the acorn before it fell
A volume of 7.2 m3 of glycerol (η = 0.934 Pa. s) is pumped through a 15 m length of pipe in 55minutes. The pressure at the input end of the pipe is 8.6 x105 Pa, and the pressure at the output end isatmospheric pressure. What is the pipe's radius?
A two stage rocket with a total mass of 925kg is traveling at a speed of 6.6 10^3 m/s away from the earth . A predesigned explosion separates into two sections of equal mass that move with a speed of 2800m/s relative to each other along the origin..
A guitar string produces 4 beats per second when sounded with a 350-Hz tuning fork and 9 beats per second when sounded with a 355-Hz tuning fork. What is the vibrational frequency of the string
A rod supports a 2.35 kg lamp. a) What is the tension in the rod? b) Estimate the components of the force that the bracket exerts on the rod.
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