Iron with 2 to 4.5 weight percent carbon is _________iron.
Fill in the blank(s) with the appropriate word(s).
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Physics & Space Science
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Why can't a lunar eclipse happen at every full moon?
What will be an ideal response?
Physics & Space Science
A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal. The projectile lands on a roof that is 4.00 m height. What is the time when the projectile hits the roof?
A. 1.11 s B. 1.27 s C. 1.33 s D. 1.49 s E. 1.67 s
Physics & Space Science
A helium-neon laser beam in a vacuum is
A) red. B) orange. C) white. D) invisible. E) none of the above
Physics & Space Science
A 25-N force is needed to move an object with a constant velocity of 2.0 m/s. What power must be delivered to the object by the force?
A) 0.50 W B) 1.0 W C) 5.0 W D) 50 W E) 100 W
Physics & Space Science