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Professor Deadwood has to hold a book at arm's length (65 centimeter form his eye) to read clearly. Obtain the refractive power of glasses that will reduce that distance to a more comfortable 30 centimeter.
A 120 V rms voltage at 1000 Hz is applied to an inductor, a 2 uF capacitor and a 100 ohm resistor. what is the value of the inductor
A middle-aged man starts to wear eyeglasses with lenses of2.0 D that allow him to read a book held as close as 25 cm.Several years later, he finds that he must hold a book no closerthan 35 cm to read it clearly with the same glasses, so hegets new..
A rectangular fish tank measures 20 cm by 60 cm by 40 cm high. The tank is filled with water to a depth of 37 cm. What is the pressure at the bottom due to the water
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
the electron-volt ev is a unit of energy 1ev 1.602 middot10-19 j 1 mev 1.602 middot10-13 j.since the unit of momentum
Electron A has a De Broglie wavelength (lambda). If electron B has twice the kinetic energy of electron A, the de Broglie wavelength of electron B is: A) 2lambda B) lamda * square root 2 C) lambda/ square root 2 D) lambda/ 2
While fishing, you get bored and start to swing a sinker weight around in a circle below you on a 0.31-m piece of fishing line. What is the angle that the fishing line makes with the vertical
A 101 Frisbee is 22 in diameter and has about half its mass spread uniformly in a disk and the other half concentrated in the rim. What is the magnitude of the torque
A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.80{Hz}. Illustrate what is the mass of the fish, ignoring the mass of the spring.
An ice cube is dropped in a glass of oil (density= 900 kg/m^3). What fraction of the ice floats above the oil
A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. What was the magnitude of the dryer's angular acceleration
How much energy would be required to break a helium nucleus into its constituents, two protons and two neutrons? The rest masses of a proton
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