Can we see the "intruder galaxy" in the image?
A: Yes.
B: No.
Ans: A: Yes.
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When is/was gravitational contraction an important energy-generation mechanism for the Sun?
A) only during solar minimum B) only during solar maximum C) when the Sun was being formed from a collapsing cloud of gas D) right after the Sun began fusing hydrogen in its core E) when the Sun transports radiation through the convection zone
Which of the following types of electromagnetic radiation has the greatest energy?
a. x-rays b. visible light c. radio d. gamma-rays e. infrared radiation
The wavelength of light in a thin film is 360 nm and the wavelength of light in vacuum is 469 nm. What is the index of refraction for the film?
A) 1.10 B) 1.30 C) 1.50 D) 1.70 E) 1.90
How does seafloor crust differ from continental crust?
A) Seafloor crust is thinner, older, and lower in density. B) Seafloor crust is thinner, younger, and higher in density. C) Seafloor crust is thicker, older, and higher in density. D) Seafloor crust is thicker, younger, and lower in density.