Most pulsars are known only as radio sources, but a few of the younger ones, like the Crab and Vela, also give off visible and even X-ray energy
Indicate whether the statement is true or false
TRUE
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What substances were found in the innermost regions (within about the inner 0.3 AU) of the solar system before planets began to form?
a. nothing at all b. only rocks and metals c. only hydrogen compounds d. only hydrogen and helium gases e. rocks, metals, hydrogen compounds, hydrogen, and helium, all in gaseous form
Sketch possible interatomic potentials as a function of interatomic separation for two materials A and B. Material A has a high melting temperature and vaporization temperature and a high elastic modulus. Material B has a low melting and vaporization temperature and a low elastic modulus.
What will be an ideal response?
A pendulum bob on a long string is raised 1.1 m above its lowest point. When it is let go, we can determine the speed of the bob as it passes through its lowest point even if we have no idea of its mass
What will be an ideal response?
A one-way mirror works because its surfaces are half-silvered
Indicate whether the statement is true or false