The Cassini space probes used electricity provided by __________
Fill in the blank(s) with correct word
radioisotope thermoelectric generators
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An object is placed a distance d in front of a plane mirror. The size of the image will be
A) dependent on the distance d. B) half as big as the size of the object. C) twice the size of the object. D) dependent on where you are positioned when you look at the image. E) the same size as the object, independent of the distance d or the position of the observer.
Suppose that, for some unknown reason, the core of the Sun suddenly became hotter and the rate of nuclear fusion thereby increased. What would happen next?
A) The Sun would quickly run out of hydrogen, causing the temperature to return to its original value. B) The rate of fusion would almost instantly skyrocket, causing the Sun to explode. C) The temperature would continue to increase, causing higher and higher fusion rates. D) The core would expand, reducing the pressure and temperature, and the rate of fusion would decrease until it returned to its original level.
If the image formed by a concave mirror is closer to the mirror than the object is, then, compared to the object, the image will be
A. smaller and inverted. B. larger and erect. C. larger and real. D. larger and inverted.
Hubble's Law states that v = H0d, and current measurements indicate that H0 ? 22 kilometers per second per million light-years. About how far away is a galaxy with a redshift indicating that it is moving away from us at 2200 kilometers per second?
A) 100 million light-years B) 200 million light-years C) 200 light-years D) 100 light-years