Why would anyone be interested in mining material from an asteroid?
What will be an ideal response?
The iron-rich asteroids, especially, should contain a high proportion of heavy elements that sank to Earth's core and are therefore very rare on Earth's surface (and consequently expensive).
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Which of the following statements is true?
A. Even though X-rays have higher energy, they move with the same speed as that of visible light. B. X-rays have higher energy, but still they move slower than visible light. C. X-rays have higher energy, hence they move faster than visible light. D. None of these choices are correct.
The Sun's core is generating energy in the form of ________.
A. X-rays B. ultraviolet waves C. visible light D. radio waves E. gamma rays
When water is turned on in a shower, the shower curtain moves towards the water spray. This partly involves
A) capillary action. B) surface tension. C) pressure changes in moving fluids. D) none of the above
The ratio of the density of a material to the density of water is the weight density
a. True b. False Indicate whether the statement is true or false