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The effect of weightlessness on the human body (mostly in the form of bone and muscle loss) is considered one of the biggest obstacles to long term human habitation of space. One solution, first proposed about 100 years ago, is to design a space station in the form of a wheel and to spin that wheel at a frequency such that the tangential acceleration at the rim of the wheel is equal to the acceleration due to gravity at the Earth's surface. Spinning the space station on its axis effectively creates what is sometimes called "artificial gravity." Obviously, the smaller the diameter of the wheel, the faster the wheel will have to rotate in order to achieve 1 g acceleration at its edge. Centrifuge studies on human subjects indicate that rotational frequencies greater than about 3-4 RPM (revolutions/minute) will likely cause astronauts to experience balance problems, dizziness, and motion sickness (and no one wants to puke in space). What radius must a space station have in order to achieve a tangential acceleration of 1 g at its rim without rotating faster than 4 RPM?
A car is traveling at a constant speed of 38.8m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has constant acceleration. What acceleration must it..
A particle moving at a speed of 0.92c is observed to have a mass of m=1682 MeV/c^2. Determine the rest mass Mo of the particle in kg
An object with a charge of +42 µC is placed at the origin. Another object with a charge of +60 µC is placed a distance of +30 cm from the first object along the x axis. What is the change in the potential energy
A -49nC charge is distributed uniformly along the x-axis from x= -1.2m to x= 4m. Consider a point at y= 1.9m on the y-axis, What is the total magnitude of the electric field at the point
A male turkey is moving towards his mate at a speed of 20.0 m/s while gobblng at a frequency of 1800 Hz. what frequency of sound does the stationary hen turkey hear
A series LCR circuit has values R = 10 ohm, C = 5.5 μF, and L = 120mH. Determine the total impedance at 50 Hz and Determine the resonant frequency
A straight wire in a magnetic field experiences a force of 0.029 N when the current in the wire is 2.5 A. What is the new current
Sodium atoms moving at 1000 m/s are incident on a slit having a width of 100 nm. At 3 m from the slit, what is the approximate transverse width of the sodium atoms wave function? These are typical values for experiments in atom optics.
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
A certain atom is ionized so that it only has one election. The first LYman line is at about 30 nm. What is the atomic number of the atom
How far apart are the two eggs 4 s after the second egg is thrown? What is the minimum separation between the eggs and when does it occur? Ignore the effects of air resistance.
A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, After the collision, the velocity of the combined bodies is
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