Ca + 2h2o → ca(oh)2 + h2 elemental calcium reacts with water at room temperature to form calcium hydroxide and hydrogen gas as shown in this equation. sodium undergoes a similar reaction with h2o. what would be the coefficient for sodium in a similar reaction? a) 1 b) 2 c) 3 d) 4
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Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear
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Energy flows from the producer level to the level. is called
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At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.
Answers: 3
Ca + 2h2o → ca(oh)2 + h2 elemental calcium reacts with water at room temperature to form calcium hy...
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