Two stars have the same absolute magnitude, but one lies twice as far from Earth as the other. It will appear half as bright
Indicate whether the statement is true or false
FALSE
Physics & Space Science
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Two copper wires have electric fields with identical strengths in their interior directed along the wire. Wire 1 has twice the diameter of wire 2. How do the currents carried by the wires compare?
A. 
B. 
C. 
D. 
E. 
F. We can’t compare using only the given information.
Physics & Space Science
The cosmic background radiation appears compatible with a blackbody source at what temperature?
a. 0.000 3 K b. 0.03 K c. 3 K d. 300 K
Physics & Space Science
Is it possible for kinetic energy to increase during an inelastic collision? Explain
What will be an ideal response?
Physics & Space Science
The Milky Way galaxy has collided with several other large galaxies in its lifetime
a. True b. False Indicate whether the statement is true or false
Physics & Space Science