If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the
A) radio signal.
B) light signal.
C) both the same time
Answer: C
Physics & Space Science
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An object is placed 10 cm from a convex lens of focal length 20 cm. What is the lateral magnification of the object?
A) 2.0 B) 2.5 C) 0.50 D) 1.0 E) 1.5
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An 80-g particle moving with an initial speed of 50 m/s in the positive x direction strikes and sticks to a 60-g particle moving 50 m/s in the positive y direction. How much kinetic energy is lost in this collision?
a. 96 J b. 89 J c. 175 J d. 86 J e. 110 J
Physics & Space Science
Considering only the effect of diffraction, what is the smallest structure resolvable using a 12keV electron microscope?
a. 
b. 
c. 
d. 
Physics & Space Science
How can Jupiter have such a strong magnetic field?
What will be an ideal response?
Physics & Space Science