To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the height of the bridge is 41 m, how long will it take for the stone to hit the water? Neglect air resistance
A) 3.6 s B) 2.3 s C) 2.6 s D) 2.9 s E) 3.2 s
D
Physics & Space Science
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Escape Speed: The value of g at the surface of spherical Asteroid X is 0.00600 m/s2, and the escape speed is 9.95 m/s. What is the radius of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2)
A. 8250 m B. 16,000 m C. 1600 m D. 800 m E. 400 m
Physics & Space Science
What is the wavelength of the K? line for Mercury?
A) 5.38 × 10-12 m B) 1.94 × 10-11 m C) 1.85 × 10-11 m D) 3.02 × 10-12 m
Physics & Space Science
Which of the following is not a unit of power?
A. Watt B. KiloWatt C. Joule/second D. Horsepower E. KiloWatt-hour
Physics & Space Science
Deoxyribonucleic acid (DNA) automatically combines raw materials to form important chemical compounds. The building blocks of these molecules are _____
A) sugars B) amino acids C) lipids D) vitamins
Physics & Space Science