The speed of an Earth satellite does NOT depend on its
A) distance from Earth.
B) mass.
C) but it depends on both
D) it depends on neither
Answer: B
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Briefly explain how Hubble's discovery of a relationship between galactic distance and recession velocity led to the idea of the Big Bang.
What will be an ideal response?
Saturation and condensation are more likely to occur on a
A) cold day. B) warm day. C) windy day. D) balmy day.
Which of the following works best for fusing hydrogen?
A) Hit the hydrogen nucleus with a neutron. B) Hit the hydrogen nucleus with an electron. C) Cool the hydrogen until the nuclei are at rest and then suddenly compress them. D) Bring the hydrogen nuclei together very slowly until they hold together. E) Heat it up to such a high temperature that collisions cause the nuclei to fuse.
Hydrogen gas seems to have a diffusivity of about 2.6 x 10^-13 m^2/s when diffusing into iron at 770 K. What would you expect the rate of diffusion or mass flow rate per unit area of hydrogen to be when stored in an iron container at 5 atmospheres pressure, assuming the density of hydrogen at 1 mm in the iron from the containing surface to be 5% of the normal hydrogen density, given by p/RT?
What will be an ideal response?