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1- Our balance is maintained, at least in part, by the endolymph fluid in the inner ear. Spinning displaces this fluid, causing dizziness. Suppose a dancer (or skater) is spinning at a very fast 2.6 revolutions per second about a vertical axis through the center of his head. Although the distance varies from person to person, the inner ear is approximately 7.0 cm from the axis of spin. part A What is the radial acceleration (in m/s^2 ) of the endolymph fluid? part B What is the radial acceleration (in g's) of the endolymph fluid? 2-A model of a helicopter rotor has four blades, each of length 4.00m from the central shaft to the blade tip. The model is rotated in a wind tunnel at a rotational speed of 540rev/min.
A- What is the linear speed of the blade tip?
B- What is the radial acceleration of the blade tip expressed as a multiple of the acceleration of gravity, g?
The dry weight of a man is 845 N. When he is submerged underwater, the reading on the scale is only 43.2 N. What is the density of the man
LIght of wavelength 587.5 nm illuminates a single slit. THe distance from teh single slit to the screen is given to be 1.5m. what is the angle from the central peak to the fourth minima
A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source.
Which object posses more gravitational potential energy: a 2-kilogram ball at 2.2 meters above the ground or a bullet that is .15 kilograms at a height of 74 meters above ground
A thin, light wire is wrapped around the rim of a wheel, The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel. what is the mass of the wheel
Suppose you are 69 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 4.90mm.
Cyclotrons are often used to bombard Oxygen-18 with a proton to create Fluorine-18. Estimate the final velocity of the proton
A small radio operates on 3.00 V and has a resistance of 15 coulomb. At what rate does the radio use electric energy.
A 68 kg student balances a 1400 elephant kg on a hydraulic lift. When a second student joins the first, What is the second student's mass
what is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 4.63m and an eyepiece whose focal length is 3.16cm
The allowed energies of a simple atom are 0.00 eV, 4.25eV , and 6.64eV. What wavelengths appear in the atom's emission spectrum
An 80 kg person climbs a set of stairs that are 5 meters high. How much gravitational potential energy does she gain
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