An atom that has lost an electron is called an ion
Indicate whether the statement is true or false
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A primary rainbow is brighter than a secondary rainbow because
A) sunlight reaching it is more intense. B) there is one less reflection inside the water drops. C) larger drops produce primary rainbows. D) the secondary bow is a dim reflection of the primary rainbow. E) none of the above
Only two forces act on a 3.0-kg mass. One of the forces is 9.0 N east, and the other is 8.0 N in the direction of 62° north of west. What is the magnitude of the acceleration of the mass?
a. 2.0 m/s2 b. 2.4 m/s2 c. 3.3 m/s2 d. 2.9 m/s2 e. 5.7 m/s2
A new generation of ground-based telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes
a. use segmented mirrors. b. use mirrors that are very thin. c. use active optics to control the shape of the mirror. d. All of the other choices are correct. e. None of the other choices are correct.
When a neutron is emitted from an unstable nucleus, the atomic mass number of the nucleus
A) does not change. B) decreases by 2. C) decreases by 1. D) increases by 2. E) increases by 1.