The most distant planet that can be seen with the unaided eye is
a. Jupiter.
b. Saturn.
c. Uranus.
d. Neptune.
c
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A diver shines light up to the surface of a smooth pond at a 10° angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of
A) less than 10°. B) 10°. C) more than 10°.
Brown dwarfs have high luminosities
Indicate whether the statement is true or false
A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy
What is the TOTAL energy of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 108 m/s, mproton = 1.67 × 10-27 kg) A) 1.50 × 10-10 J B) 8.77 × 10-10 J C) 3.01 × 10-10 J D) 2.07 × 10-10 J E) 5.69 × 10-11 J
A charged particle (mass = M, charge = Q> 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with a speed V?
A. QVB toward the east B. Zero C. QVB toward the west D. QVB upward E. QVB toward the south