Briefly describe the scientific method
What will be an ideal response?
The scientific method is a process scientists use to better understand the natural world. It is a combination of many ways of analyzing information, finding relationships, and creating new ideas. Scientists use insight and ingenuity to form, test, revise, and possibly discard hypotheses, in the quest to gain a fundamental understanding of nature.
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The angle that an incident light ray makes with the surface normal is
A. smaller than the angle that the reflected ray makes with the normal B. the same size as the angle that the reflected ray makes with the normal C. greater than the angle that the reflected ray makes with the normal
A 7 cm diameter heat exchanger rod at 400ºC is surrounded by a 15 cm diameter heat shield. If the surroundings are a black body at 20ºC, determine the equilibrium temperature of the shield if (a) both rod and shield are black bodies, (b) emissivity of both is 0.7, and (c) the rod is a black body and the shield has emissivity of 0.7.
Which Mars mission searched for life in the Martian soil in the 1970's?
A) Pathfinder B) Phoenix C) Viking D) Mariner
What is the solar wind?
A) a stream of charged particles flowing outward from the surface of the Sun B) the uppermost layer of the Sun, which lies just above the corona C) the strong wind that blows sunspots around on the surface of the Sun D) the wind that causes huge arcs of gas to rise above the Sun's surface