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The radial distance from the center of a centrifuge to a sample is 6m. You would like to subject the sample to a normal acceleration of 100g's. What speed of rotation in RPM is needed? If you want the centrifuge to reach this rotational speed from rest in two minutes, what constant angular velocity is required?
The kinetic energy of an object is increased by a factor of 7, by what factor is the magnitude of its momentum changed
On a workday, the average decibel level of a busy street is79dB with 100 cars passing a given point every minute. what is the decibel level of the street
The primary coil of a transformer has 100 turns and its secondary coil has 400 turns. what voltage is present in its secondary coil
Consider an old-fashion bicycle with a small wheel of radius 0.25 m and a large wheel of radius 0.86 m. Find the total distance traveled by the rider
A tiny particle of density 3275 kg/m3 is at the same distance from the Sun as the Earth is (1.5 1011 m). Assume that the particle is spherical and perfectly reflecting. What would its radius have to be for (the force due to) the outward radiation pre..
For a travelling wave in a string under trnsion, describe the kinds of energy present as the waves moves during the string. Also explain the variations in the energy density present in the travelling wave for a one wavelength amount of the travelling..
Esitmate the change in temperature of 5 m^3 of air, to an increase in pressure of 50 kPa. The initial temperature of the air is 15*C at atmospheric pressure
trumpet creates a sound intensity level of 1.23 x 10^2 dB at a distance of 0.80 m. What is the sound intensity of a trumpet
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How many balloons can the tank blow up
A sodium atom (Z = 11) contains 11 protons in its nucleus. Strictly speaking, the Bohr model does not apply, determine the corresponding radius r of the outermost Bohr orbit
You are on an airplane traveling 30° south of due west at 100.0 m/s with respect to the air. What is the heading of the plane with respect to the ground
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
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