The surface of the neutron star RXJ2015 has a temperature of 10 million K. This neutron star glows most strongly in
A) visible light.
B) infrared light.
C) emission lines.
D) radio light.
E) X-ray light.
E
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As the Moon grows fatter from new to full, it is said to wax
Indicate whether the statement is true or false
Light behaves primarily as a wave when it
A) travels from one place to another. B) interacts with matter. C) both of these D) neither of these
Photon Energy: What is the photon energy of red light having a wavelength of 6.40 × 102 nm? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 1.13 × 10-19 J B. 1.31 × 10-19 J C. 3.11 × 10-19 J D. 1.94 × 10-19 J
Suppose we put a ball at rest on a rug and then start pulling the rug out from under the ball in a certain direction. The ball rolls without slipping on the rug as the rug moves under it. The friction force that the contact interaction between the rug and ball exerts on the ball does
A. positive work on the ball. B. negative work on the ball. C. no work on the ball.