Electrons exist in a cloud-like structure around the nucleus called a(n) ________.
A. spectrum
B. orbital
C. particle wave
D. level
Answer: B
Physics & Space Science
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Regular satellites orbit both in the prograde and retrograde directions
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, the force on the crate is about
A) 4 N. B) 10 N. C) 40 N. D) 160 N.
Physics & Space Science
When the vector sum of three co-planar forces, 
, 
, and 
, is
parallel to , we can conclude that andÂ
A.
must sum to zero.
B.
must be equal and opposite.
C.
must have equal and opposite components perpendicular to .
.D.
must have equal and opposite components parallel to .
.E.
must have equal and opposite components parallel and perpendicular to .
.
Physics & Space Science
Two cars crash head on. At any given time during the crash, the magnitudes of the collision forces exerted on each car are exactly equal. This is an example of Newton's
a. first law. b. second law. c. third law. d. no law.
Physics & Space Science