What would you see if you were on the Moon during a lunar eclipse?
What will be an ideal response?
During a lunar eclipse, you would see Earth pass in front of the Sun. It would be completely dark where you were.
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What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 243 nm B) 486 nm C) 556 nm D) 609 nm E) 312 nm
You throw a baseball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down
A) The work is positive on the way up and positive on the way down. B) The work is positive on the way up and negative on the way down. C) The work is negative on the way up and positive on the way down. D) The work is negative on the way up and on the way down because gravity is always downward.
An object of mass m moving in a certain direction has a kinetic energy of 4.0 J. It hits a wall and comes back with half its original kinetic energy. If the speed of the object on return is 2.0 m/s, what is the mass of the object?
A) 2.0 kg B) 2.8 kg C) 3.8 kg D) 1.0 kg E) 4.0 kg
What color will be transmitted through overlapping cyan and magenta filters?
a) Yellow b) Black c) Blue d) White