Which of the following metals is least likely to be suitable for wire drawing?
(a) Magnesium
(b) Aluminum
(c) Copper
(d) Iron
(a) Magnesium
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Describe one of the future planned space missions to search for extrasolar planets. How will it improve on current observations?
What will be an ideal response?
What is the speed of a proton that has been accelerated from rest through a potential difference of 4.0 kV?
A. 1.1 × 106 m/s B. 9.8 × 105 m/s C. 8.8 × 105 m/s D. 1.2 × 106 m/s E. 6.2 × 105 m/s
The radius of the earth is R. At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?
A) 0.41R B) 0.50R C) 1.0R D) 1.4R E) 2.0R
A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two second time. The distance below the rooftop is __________
Fill in the blank(s) with correct word