Addition of an electron to an atom gives a
a. negative ion.
b. neutron.
c. new element.
d. positive ion.
a
Physics & Space Science
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The momentum of an isolated system is conserved
A) only in inelastic collisions. B) only in elastic collisions. C) in both elastic and inelastic collisions.
Physics & Space Science
Space itself is expanding
Indicate whether the statement is true or false
Physics & Space Science
The stellar parallax of many stars is too small to be measured. This is evidence that these stars
a. move in very small orbits. b. are almost in line with the Sun. c. are very distant. d. do not move.
Physics & Space Science
The speed of water in a stream is affected by
A) hydraulic gradient, recharge, and channel geometry. B) gradient, discharge, and channel geometry. C) high gradient, laminar flow, and erosion. D) gradient, turbulence, and friction.
Physics & Space Science