A 590-kg rocket is at rest on the launch pad. What upward thrust force is needed to accelerate the rocket uniformly to an upward speed of 28 m/s in 3.3 s?
What will be an ideal response?
1.1 × 104 N
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Multiple-Object Accelerating Systems: A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a very light rope that goes over an ideal pulley. If the masses are gently released, what is the resulting acceleration of the masses?
A. 0.00 m/s2 B. 3.7 m/s2 C. 2.5 m/s2 D. 4.9 m/s2 E. 6.1 m/s2
The approximate main-sequence lifetime of a star of spectral type O is ________
A) 300 million years B) 10 billion years C) 10,000 years D) 3 million years
A binary star system is one with two stars orbiting each other. How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight and determine their periods?
What will be an ideal response?
Balance the chemical equation: PCl5 + H2O ? H3PO4 + HCl