An airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop
4 080 m
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A large luminosity star
a) is always at a larger distance than a small luminosity star b) emits more light than a low luminosity star c) is always redder than a star with a small luminosity d) is at a lower temperature than a small luminosity star e) is always at a smaller distance than a small luminosity star
Object 1 has twice the mass of Object 2 . Each of the objects has the same magnitude of momentum. Which of the following statements is true?
a. Both objects can have the same kinetic energy. b. One object has 0.707 times the kinetic energy of the other. c. One object has twice the kinetic energy of the other. d. One object has 4 times the kinetic energy of the other.
A charged particle (m = 5.0 g, q = ?70 ?C) moves horizontally at a constant speed of 30 km/s in a region where the free fall gravitational acceleration is 9.8 m/s2 downward, the electric field is 700 N/C upward, and the magnetic field is perpendicular to the velocity of the particle. What is the magnitude of the magnetic field in this region?
a. 47 mT b. zero c. 23 mT d. 35 mT e. 12 mT
Convert 14°C to K
A) 46 K B) 100 K C) 187 K D) 287 K E) 474 K