When 1.0 gram of hydrogen combines with 8.0 grams of oxygen, 9.0 grams of water is formed. But is this true? During the reaction 2.86 × 105 J of energy is released. How much mass is actually lost in this reaction?
What will be an ideal response?
3.18 × 10?12 kg
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Observations of the tiny irregularities in the cosmic microwave background support the idea that the Universe
A. must be one of many "island universes." B. must contain about 5 times more dark matter than regular matter. C. does not contain dark energy. D. must contain hidden pockets of antimatter.
A space station of diameter 40. meters is turning about its axis at a constant rate. What is the period of revolution of the space station if the outer rim experiences an acceleration of 2.5 m/s2?
A) 10. s B) 14. s C) 11. s D) 13. s E) 18. s
The Eocene is a geologic______________
Fill in the blank(s) with correct word
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
Assuming a circular orbit, (a) what is the period of the International Space Station's orbit? (b) what is the speed of the International Space Station in its orbit?