A toy rocket is launched vertically from ground level at time t = 0 s. The rocket engine provides constant upward acceleration during the burn phase
At the instant of engine burnout, the rocket has risen to 49.0 m and acquired an upward velocity of 60.0m/s The rocket continues to rise with insignificant air resistance in unpowered flight, reaches maximum height, and falls back to the ground. The maximum height reached by the rocket is closest to
A) 221 m. B) 209 m. C) 244 m. D) 233 m. E) 256 m.
D
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Answer the following statement true (T) or false (F)
Lens-Maker Formula: A double-convex thin lens has radii of curvature of magnitude 46 cm, and it is made of glass of index of refraction 1.60. What is the focal length of this lens?
A. infinite B. 38 cm C. -30 cm D. 18 cm E. -19 cm
Coulomb's Law: A proton is located at the point (x = 1.0 nm, y = 0.0 nm) and an electron is located at the point (x = 0.0 nm, y = 4.0 nm). Find the magnitude of the electrostatic force that each one exerts on the other. (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.6 × 10-19 C)
A. 1.4 × 10-11 N B. 5.3 × 10-18 N C. 5.3 × 108 N D. 5.9 × 10-15 N
It used to be thought that both of Mars' moons were captured asteroids. Information from Mars Express and Mars Global Surveyor has led to the conclusion that Phobos may have formed by a different process. Briefly describe that process
What will be an ideal response?