A 4,000 kg satellite is traveling in a circular orbit 200 km above the surface of the Earth. A 3.00 gram marble is dropped inside the satellite. What is the force of gravity on the marble as viewed by the observers on the Earth? 
A. 0.405 N
B. 0.362 N
C. 0.277 N
D. 0.202 N
E. 0.185 N
C. 0.277 N
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A gas in a furnace has an extinction coefficient of 0.01m^-1 and a mean beam length of 10 m. What is the transmissivity of radiation through the gas?
What will be an ideal response?
The atomic number and mass number for calcium-39 are 20 and 39, respectively. How many neutrons are in one atom?
A) 1 B) 19 C) 20 D) 39 E) 59
A flask contains a mixture of argon and neon gases at a stabilized temperature. The root-mean-square speed of the argon gas is determined to be 1.21 km/s
What is the root-mean-square speed of the neon gas? The atomic mass of argon is 39.95 g/mol, and that of neon is 20.18 g/mol.
Satellites in low-Earth orbits are more likely to crash to Earth when the sunspot cycle is near solar maximum because
A) it is too dangerous to send the Space Shuttle to service satellites during solar maximum. B) Earth's upper atmosphere tends to expand during solar maximum, exerting drag on satellites in low orbits. C) of increased magnetic interference. D) they are more likely to have their electronics "fried" by a solar flare during solar maximum.