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A common problem inside orbiting space stations is monitoring astronauts weight, or better said mass. The apparent weightlessness does not allow the use of conventional scales (note that due to the close proximity to earth, the astronauts weight did not really change drastically.)A solution to this problem is the use of harmonic oscillators (see https://www-spof.gsfc.nasa.gov/stargaze/Sskylab.htm for a description).You have carefully measured the period for the oscillation of the empty chair, which is attached to an ideal spring. You already determined the mass of the empty chair to be 18 kg. With and astronaut strapped into the chair, the period of the oacillation increases by 127 %. What is the mass of the astronaut?
an air-conditioner with refrigerant r-134a as the working fluid is used to keep the room at 23c by rejecting waste heat
Runner A is initially 6.80 km west of a flagpole and is running with a constant velocity of 2.6 km/h due east. Runner B is at first 3.80 km east of the flagpole and is running with a constant velocity of 8.20 km/h due west. What will be the distan..
Calculate the number of electrons in a steel iron pinhead. The pinhead may be assumed to be spherical with a diameter 2mm
A uniform solid flywheel of radius 1.4m and mass 15kg rotates at 2.4 rad/s. What is the magnitude of flywheel's angular momentum in kg.m^2/s.
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
A thin stream of water flows smoothly from a faucet and falls straight down. At one point the water is flowing at a speed of v1 = 1.15 m/s. What is the vertical distance h between these two points
Conisder the Earths magnetic field (53 uT) at a point near the equator where the field is horizontal, Calculate the velocity, V of this proton
Calculate the Q-value of the alpha decay of 211Po. It was found that 211Po can follow an alpha decay to an meta state. The alpha energy in this decay is 7.275 MeV
After a 0.813 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.46E+6 m/s. Through what angle was the photon scattered
A box of textbooks of mass 24.7 kg rests on a loading ramp that makes angle a with the horizontal. The coefficient of kinetic friction is .25 and the coefficient of static friction is .37. Find out the minimum angle at which the box starts to sl..
As expected, the predictions of Coulomb's law are well confirmed. You find that the forces are: repulsive? or attractive? 2. and that the magnitude of each force is?
A 0.30-kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20-kg puck that is initially moving along the x-axis with a velocity of7.1 m/s. Find the fraction of kinetic energy lost in the collision
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