A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?
A) 2.5 m/s
B) 5.0 m/s
C) 10 m/s
D) 0 m/s
E) 1.3 m/s
B
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Refracting telescopes use a mirror to gather and focus light
a. True b. False Indicate whether the statement is true or false
According to quantum field theory, what happens when two charged particles exert forces on each other?
A) Each particle causes the other particle's matter field to vibrate more rapidly. B) The two particles exchange their matter fields with each other. C) An electromagnetic wave passes from one particle to the other. D) Electrons are exchanged between them. E) Photons are exchanged between them.
In a transition from one vibrational state to another, a molecule emits a photon of wavelength 5.56 µm
What is the energy difference between these two states? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 13.6 MeV B) 13.6 eV C) 0.223 eV D) 0.223 MeV E) 2.23 MeV
The deflection of one lithospheric plate under another is called
a. subduction. b. seafloor spreading. c. convergence. d. continental drift.