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In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than two revolutions per minute. On the other hand, the magnitude of the centripetal acceleration at the astronauts' feet should equal the magnitude of the acceleration due to gravity on earth. Thus, to eliminate the difficulties with motion sickness, designers must choose the distance between the astronauts' feet and the axis about which the space station rotates to be greater than a certain minimum value. What is this minimum value?
An ideal air conditioner operating on a Carnot cycle absorbes heat Q2 from a house at temperature T2 and discahrges Q1 to the outside at temperature T1, consumng elecrical energy E.
A research Van de Graaff generator has a 3.80 m diameter metal sphere with a charge of 1.06 mC on it. What is the electric potential on the surface of the sphere
A ball bounces upward from the ground with a speed of 14 m/s, How high above the ground does the ball hit the wall
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 45? angle with the previous one
The earth's magnetic field, with a magnetic dipole moment of 8.0×10^22 A*m^2 , is generated by currents within the molten iron of the earth's outer core. What is the current in the current loop
A person walks 25.0 north of east for 3.10 km. explain how far would another person walk due north and due east to arrive at the same location?
Scientists want to place a 3 × 103 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.8 times the radius of Mars above the surface of the planet, What is the force of attraction between Mars and the satel..
An object's true weight is 135N. When it is completely submerged in water, what is the density of the object
Bill can throw a ball vertically at a speed 1.4 times faster than Joe can. How many times higher will Bill's ball go than Joe's
A 3.65 uf capacitor, a 9.25 uf capacitor, and a 6 V battery are connected in parallel to make a complete circuit. what is the voltage of each capacitor
A block with mass m = 4 kg is sinking with constant acceleration aT = 1.9 m/s2 into the ground. The acceleration due to gravity is g = 9.81 m/s2. In what direction is the normal force
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
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