An airplane is traveling at 150 m/s in level flight. If the airplane is to make a change in direction, it must travel in a horizontal curved path. To fly in the curved path, the pilot banks the airplane at an angle such that the lift has a horizontal component that provides the horizontal centripetal acceleration to move in a horizontal circular path. If the airplane is banked at an angle of 12.0 degrees, then the radius of curvature of the curved path of the airplane is
A. 10.8 km.
B. 8.74 km.
C. 8.00 km.
D. 7.33 km.
E. 6.90 km.
A. 10.8 km.
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A proton is accelerated from rest through a potential difference of 150 V. It then enters a region of uniform magnetic field and moves in a circular path (radius = 12 cm). What is the magnitude of the magnetic field in this region?
a. 18 mT b. 12 mT c. 15 mT d. 22 mT e. 10 mT
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, this second lens having a focal length of 8.0 cm. How far past the second lens is the final image formed?
A) 40 cm B) 35 cm C) 100 cm D) 6.5 cm E) 25 cm
A heat engine that converts all the heat taken in from a single temperature source to work would be in violation of what natural law? ________ (more than one word)
What will be an ideal response?
The triple-alpha process
a. controls the pulsations in Cepheid variable stars. b. is the nuclear fusion of hydrogen to helium in massive stars. c. is the process that produces the neutrinos we receive from the Sun. d. requires a temperature of about 5,000,000 K to operate. e. occurs during helium flash.