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Question: A CD-ROM drive in a computer spins the 12-cm-diameter disks at 7900 rpm.
Part A: What is a disk's period (in s)?
I need help to solve the above question and express your answer to two significant figures and include the appropriate units.
a person's reaction time is generally not quick enough to allow the person to catch a dollar bill dropped between the fingers. If a typical reaction time in this case is 0.25 s
An electron and a positron each have a mass of 9.11 x 10-31 kg. They collide and both vanish, determine the energy of the electromagnetic radiation
a worker pushes a 20 kg crate straight across a 1 m long section of horizontal floor with a constant horizontal force
A spaceship moves with a speed v = 0.86c relative to a space platform that has a landing strip 4500 m long. What is the apparent length of the landing strip
Suppose a toy oscillated with a frequency of 500 Hz and hence a period of 0.002s. If the toy moves past an observer at 0.9c, what is the frequency as measured by the observer?
A typical red blood cell subtends an angle of only 1.8×10^-5 rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
1. a street light is supported by two wires and each makes a different angle from each other. the one on the left
point charges of 2.00 nc and - 5.00 nc are arranged on two of the vertices of an equilateral triangle. find the
Mars has an orbital period of 1.881 Earth years, Develop the relation between semimajor axis and inclination for a Mars circular sun-synchronous orbit
A 12.0 resistor, 10.0 mH inductor, and a 50.0 µF capacitor are connected in series to a 55.0 V (rms) source having variable frequency. Find out the energy delivered to the circuit during one period if the operating frequency is twice the resonance..
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 568 nm and the interference pattern observed on a screen 4.50 m from the slits.
A transverse wave propagates in the positive x-axis with a wavelength of .3m and a period of .001s. What is the frequency and speed of this wave
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