1. Sarah Frazier, "Real Martians: How to Protect Astronauts from Space Radiation on Mars,"
NASA, updated: Aug. 6, 2017, https://www. nasa. gov/feature/goddard/real-martians-h ow-to-
protect-astronauts-from-space-radia tion-on-mars.
A. The second source of energetic particles is harder to block,
B. Throughout the entire trip, astronauts must be protected from two
sources of radiation,
C. The first comes from the Sun, which regularly releases a steady stream
of solar particles
D. These particles come from galactic cosmic rays.
E. A human mission to Mars means sending astronauts into space for a
minimum of a year,
Answers: 2
Physics, 22.06.2019 01:10
The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping
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Physics, 22.06.2019 10:30
Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.
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An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?
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Physics, 23.06.2019 00:30
What is the relationship between globular clusters and the milky way?
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1. Sarah Frazier, "Real Martians: How to Protect Astronauts from Space Radiation on Mars,"
NASA, u...
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